PR:O 8 - Loudspeaker HK AUDIO - Free user manual and instructions
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| Product type | Passive speaker |
| Brand | HK Audio |
| Model | PR:O 8 |
| Dimensions (L x H x D) | 450 x 280 x 260 mm |
| Weight | 8 kg |
| Power handling (RMS) | 200 W |
| Power handling (Peak) | 400 W |
| Nominal impedance | 8 ohms |
| Frequency response | 60 Hz - 20 kHz |
| Sensitivity (1W/1m) | 95 dB |
| Input connectors | 1 x Speakon NL4, 1 x 6.35 mm jack |
| Recommended use | Mobile sound reinforcement, fixed installation |
| Cabinet material | Birch plywood |
| Protective grille | Perforated steel with acoustic foam |
| Care and cleaning | Clean with a dry, soft cloth. Do not use abrasive products. |
| Safety | Do not expose to water or moisture. Keep out of reach of children. |
| Spare parts and repairability | Available from HK Audio after-sales service (speaker, grille, connectors). |
| General information | 2-way speaker with 8" woofer and compression tweeter. Ideal for high-quality sound reproduction. |
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USER MANUAL PR:O 8 HK AUDIO
Manual 1.6
PREMIUM PR:0
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Important Safety Instructions! Read before connecting!
This product has been built by the manufacturer in accordance with IEC 60065 and left the factory in safe working order. To maintain this condition and ensure non-risk operation, the user must follow the advice and warning comments found in the operating instructions. If this product shall be used in vehicles, ships or aircraft or at altitudes exceeding 2000 m above sea level, take care of the relevant safety regulations which may exceed the IEC 60065 requirements.
WARNING: To prevent the risk of fire and shock hazard, do not expose this appliance to moisture or rain. Do not open case — no user serviceable parts inside. Refer service to qualified service personnel.
This symbol, wherever it appears, alerts you to the use of uninsulated dangerous voltage inside the enclosure – that may be sufficient to constitute a risk of shock.
This symbol, wherever it appears, alerts you to the use of externally accessible hazardous voltage. External connected to any terminal marked with this symbol must be "ady made cable" complying with the manufacturers' extensions, or must be a wiring installed by instructed only.
This symbol, wherever it appears, alerts you to important and maintenance instructions in the accompanying. Read the manual.
This symbol, wherever it appears, tells you: Take care! ice! To prevent burns you must not touch.
- Read these instructions.
- Keep these instructions.
- Follow all warnings and instructions marked on the product and in this manual.
- Do not use this product near water. Do not place the product near water, baths, wash basins, kitchen sinks, wet areas, swimming pools or damp rooms.
- Do not place objects containing liquid on the product – vases, glasses, bottles etc.
- Clean only with dry cloth.
- Do not remove any covers or sections of the housing.
- The set operating voltage of the product must match the local mains supply voltage. If you are not sure of the type of power available consult your dealer or local power company.
- To reduce the risk of electrical shock, the grounding of this product must be maintained. Use only the power supply cord provided with this product, and maintain the function of the center (grounding) pin of the mains connection at any time. Do not defeat the safety purpose of the polarized or grounding-type plug.
- Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the device! Power supply cords should always be handled carefully. Periodically check cords for cuts or sign of stress, especially at the plug and the point where the cord exits the device.
- Never use a damaged power cord.
- Unplug this product during lightning storms or when unused for long periods of time.
- This product can be fully disconnected from mains only by pulling the mains plug at the unit or the wall socket. The product must be placed in such a way at any time, that disconnecting from mains is easily possible.
- Fuses: Replace with IEC127 (5x20mm) type and rated fuse for best performance only! It is prohibited to use "patched fuses" or to short the fuse-holder. Replacing any kind of fuses must only be carried out by qualified service personal.
- Refer all servicing to qualified service personnel. Servicing is required when the unit has been damaged in any way, such as:
- When the power cord or plug is damaged or frayed.
- If liquid has been spilled or objects have fallen into the product.
- If the product has been exposed to rain or moisture.
- If the product does not operate normally when the operating instructions are followed.
- If the product has been dropped or the cabinet has been damaged.
- Do not connect external speakers to this product with an impedance lower than the rated impedance given on the product or in this manual. Use only cables with sufficient cross section according to the local safety regulations.
- Keep away from direct sunlight.
- Do not install near heat sources such as radiators, heat registers, stoves or other devices that produce heat.
- Do not block any ventilation openings. Install in accordance with manufacturer's instructions. This product must not be placed in a built-in installation such as a rack unless proper ventilation is provided.
- Always allow a cold device to warm up to ambient temperature, when being moved into a room. Condensation can form inside it and damage the product, when being used without warming up.
- Do not place naked flame sources, such as lighted candles on the product.
- The device must be positioned at least 20 cm/8" away from walls.
- Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the product. When a cart is used, use caution when moving the cart/product combination to avoid injury from tip-over.
- Use only accessories recommended by the manufacturer, this applies for all kind of accessories, for example protective covers, transport bags, stands, wall or ceiling mounting equipment. In case of attaching any kind of accessories to the product, always follow the instructions for use, provided by the manufacturer. Never use fixing points on the product other than specified by the manufacturer.
- This appliance is NOT suitable to be used by any person or persons (including children) with limited physical, sensorical or mental ability, or by persons with insufficient experience and/or knowledge to operate such an appliance. Children under 4 years of age must be kept away from this appliance at all times.
- Never push objects of any kind into this product through cabinet slots as they may touch dangerous voltage points or short out parts that could result in risk of fire or electric shock.
- This product is capable of delivering sound pressure levels in excess of 90 dB, which may cause permanent hearing damage! Exposure to extremely high noise levels may cause a permanent hearing loss. Wear hearing protection if continuously exposed to such high levels.
- The manufacturer only guarantees the safety, reliability and efficiency of this product if:
- Assembly, extension, re-adjustment, modifications or repairs are carried out by the manufacturer or by persons authorized to do so.
- The electrical installation of the relevant area complies with the requirements of IEC (ANSI) specifications.
- The unit is used in accordance with the operating instructions.
- The unit is regularly checked and tested for electrical safety by a competent technician.
General Notes on Safety for Loudspeaker Systems
Mounting systems may only be used for those loudspeaker systems authorized by the manufacturer and only with the mounting accessories specified by the manufacturer in the Installation Instructions. Read and heed the manufacturer's installation instructions. The indicated load-bearing capacity cannot be guaranteed and the manufacturer will not be liable for damages in the event of improper installation or the use of unauthorized mounting accessories.
The system's load-bearing capacity cannot be guaranteed and the manufacturer will not be liable for damages in the event that loudspeakers, mounting accessories, and connecting and attaching components are modified in any way.
Components affecting safety may only be repaired by the manufacturer or authorized agents, otherwise the operating permit will be voided.
Installation may be performed qualified personnel only, and then only at pick-points with sufficient load-carrying capacity and in compliance with local building regulations. Use only the mounting hardware specified by the manufacturer in the installation instructions (screws, anchors, etc.). Take all the precautions necessary to ensure bolted connections and other threaded locking devices will not loosen.
Fixed and portable installations (in this case, speakers and mounting accessories) must be secured by two independent safeties to prevent them from falling. Safeties must be able to catch accessories or parts that are loose or may become loose. Ensure compliance with the given national regulations when using connecting, attaching, and rigging devices. Factor potential dynamic forces (jerk) into the equation when determining the proper size and load-bearing capacity of safeties. e sure to observe speaker stands' maximum load-bearing capacity. Note that for reasons of design and construction, most speaker stands are approved to bear centric loads only; that is, the speakers' mass has to be precisely centered and balanced. Ensure speaker stands are set up stably and securely. Take appropriate added measures to secure speaker stands, for example when:
- the floor or ground surface does not provide a stable, secure base.
- they are extended to heights that impede stability.
- high wind pressure may be expected.
- there is the risk that they may be knocked over by people. Special measures may become necessary as precautions against unsafe audience behavior. Do not set up speaker stands in evacuation routes and emergency exits. Ensure corridors are wide enough and put proper barriers and markings in place when setting speaker stands up in passageways. Mounting and dismounting are especially hazardous tasks. Use aids suitable for this purpose. Observe the given national regulations when doing so.
Wear proper protection (in particular, a helmet, gloves, and safety shoes) and use only suitable means of ascent (ladders, scaffolds, etc.) during installation. Compliance with this requirement is the sole responsibility of the company performing the installation.
After installation, inspect the system comprised of the mounting fixtures and loudspeakers to ensure it is properly secured.
The operator of loudspeaker systems (fixed or portable) must regularly inspect or task a third party to regularly inspect all system components in accordance with the given country's regulations and have possible defects repaired immediately. We also strongly recommend maintaining a logbook or the like to document all inspections.
When deploying speakers outdoors, be sure to take into account the stability and load-bearing capacity of platforms and surfaces; loads and forces exerted by wind, snow, and ice; as well as thermal influences. Also be sure to provide sufficient safety margins for the rigging points used for flown systems. Observe the given national regulations when doing so.
Professional loudspeaker systems can produce harmful volume levels. Even prolonged exposure to seemingly harmless levels (starting at about 95 dBA SPL) can cause permanent hearing damage! Therefore we recommend that everyone who is exposed to high volume levels produced by loudspeaker systems wears professional hearing protection (earplugs or earmuffs).
Manufacturer: Stamer Musikanlagen GmbH, Magdeburger Str. 8, 66606 St. Wendel, Germany
Welcome to the HK Audio family!
Thank you for choosing (yet another) HK Audio product!
PREMIUM PR:O active enclosures are end-to-end sound reinforcement solutions comprising loud-speakers, power amps, and integrated circuitry precision-tuned to control these components. These satellites, bass bins, and monitors may be combined with one another. Deployed as standalone enclosures, they readily integrate into other sound reinforcement systems. Feel free to connect passive loudspeakers – ideally, a passive PREMIUM PR:O Series enclosure - to the parallel circuits of all active models except the PR:O 18 Sub A and the PR:O 210 Sub A to extend your system without having to add another power amp to your rig. What's more, our engineers developed new technologies specifically to maximize the performance of PREMIUM PR:O active cabinets.
Warranty
Register your PREMIUM PR:O using the enclosed warranty card to extend your warranty to five years free of charge! Important note: Be sure to register each PREMIUM PR:O powered enclosure individually.
To this end, use the convenient online registration option at www.hkaudio.com.
If you are unable to register online, please complete the enclosed warranty card completely and mail or fax it to us. Registration is only valid if the warranty card is filled out and returned to HK AUDIO or the device is registered via Internet within the registration period. We are also interested in learning where and by whom our devices are used. This information will help us design future products. Your data are of course protected by privacy laws.
Thank you!
HK AUDIO
Technical Service
Postfach 1509
66959 St. Wendel, Germany
Table of contents
1 PR:O 8 A, PR:O 10 XA, PR:O 12 A, PR:O 12 MA,
PR:O 15 A, PR:O 15 XA .... 8
1.1 Control Features 8
1.2 Setting Up and Connecting Cabinets 8
1.3 Operating Speakers 8
1.4 Settings 9
1.5 Alignment....9
2 PR:O 18 Sub A, PR:O 210 Sub A 10
2.1 Control Features 10
2.2 Setting Up and Connecting the Cabinets 10
2.3 Operating Speakers 10
2.4 Settings 11
3 Tips and Tricks 11
4 Troubleshooting 11
5 Technical Data 12
Digital Amping - Enhanced efficiency and dynamics
With an efficiency rating topping the 90% mark, digital power amps are smaller, lighter, and more compact than conventional amps. The reduced thermal load on components clearly enhances reliability. The slew rate is far faster and the attenuation factor is higher, resulting in perceptibly more responsive and accurate performance.
RMS/Peak-Limiter
A smart combination RMS / Peak Limiter achieves balanced dynamic response at high loads while protecting components against overload. (The PR:0 18 Sub A and the PR:0 210 Sub A come without an RMS Limiter.)
Subsonic-Filter - Protection against low-frequency rumble
The integrated subsonic filter eliminates accidental and unintentional signals such footfalls, wind, or the sound of a hand inadvertently brushing a microphone. It cuts these frequencies drastically, freeing energy to better render bass impulses. The result: delightfully dynamic and natural-sounding low-end response.
DuoTilt 3/7™ - Making the most of sonic energy
The specially developed DuoTilt™ pole mount allows sound energy to be utilized far more efficiently. DuoTilt™ offers 3° and 7° angles of tilt, enabling perfect satellite-to-audience alignment. Troublesome ceiling reflections are minimized, yielding a clearer, punchier, and tighter sonic image. MonoTilt™ (PR:0 8 A) offers one angle of tilt.
1 PR:O 8 A, PR:O 10 XA, PR:O 12 A, PR:O 12 MA PR:O 15 A, PR:O 15 XA
„Speech“ boosts vocal signals, and turning it towards „Music“ conjures a bigger, bolder sonic image with more low end and less midrange frequencies.
1.1 Control Features
1 Gain
This knob adjusts the input level.
2 Tone (not available on the PR:O 12 MA)
The Tone knob lets you optimize your active speaker cabinet for music or speech applications. It uses a special filtering setup that adapts frequency response to suit the given requirements. Room acoustics vary as does the cabinet's position, so we recommend you find the optimum position by piping in a full-fledged music signal, using a microphone, and twisting the knob. Turning it towards
The Tone knob lets you tune the speaker cabinet to suit music or public address applications. Its special filtering circuit adapts its frequency response to the given requirements.
Note: Twisting the Tone knob counterclockwise towards Music gradually attenuates a broad midrange frequency band with a center frequency of 1500 Hz (2500 Hz -PR:O 10 XA, 2600 Hz - PR:O 8 A). The maximum cut is 2 dB, achieved by setting the knob to the far left position. At the same time, this adjustment boosts bass frequencies in the range of 80 to 100 Hz in equal measure by up to 2 dB. Twisting the Tone knob counterclockwise towards Speech achieves the opposite effect, boosting the midrange frequency band and cutting bass frequencies accordingly by up to 2 dB.
A special corrective circuit compensates for this EQ effect so that the perceived volume level remains the same despite the change in tone. Setting the knob to the center position defeats the filter.
3 Mic/Line Switch (not on the PR:O 12 MA)
When patching in a microphone, adjust the input gain by setting the Line/Mic button to Mic. This provides a 30-dB gain boost, thereby optimizing the input for microphone signals.
4 Input
This electronically balanced XLR/ 1/4" combi input accepts mixer signals (pin 1= ground, 2= +, 3= -).
5 Through
This parallel output patches the incoming line signal through, for example, to other PREMIUM PR:O active speakers or monitors.
6 Limiter Status LED
This dichromic LED indicates the signal level and limiter status. Green means the signal level is okay; red means the limiter has engaged and is responding to high-volume signal peaks. CAUTION! This is not a clip LED. It's okay if it lights up red briefly every now and then; this merely indicates the RMS Limiter is operating. If the signal LED remains constantly in the red at signal peaks, check the source signal's input level and back off the speaker's Gain knob. A status LED that lights up red continuously indicates there is a fault in the speaker system.
7 Power Switch
This is the PREMIUM PR:O powered cabinet's on/off button. The signal LED lights up green to indicate the cab is powered up.
Note: The Power button is embedded to prevent unintentional actuation. When set to POWER ON, the button sits almost flush with the connector panel. This ensures it is not engaged accidentally, yet remains readily accessible.
8 Mains Input
Use the factory-included mains cord to connect this socket to a wall outlet.
Note: All PREMIUM PR:O active speakers are equipped with V-Lock mains sockets. If you use a VOLEX locking mains cord or another optionally available brand with the same design, you can fix the mains cord in place to prevent accidental disconnection.
9 Parallel Speaker Out
Use this Speakon NL4 output to connect another passive PREMIUM PR:O enclosure or another manufacturer's passive cabinet. Be sure to watch the impedance rating, connecting no more than one enclosure with an impedance no lower than 8 ohms. The power amp delivers up to 300 watts to this output.
1.2 Setting Up and Connecting Cabinets
Connect cords routed from your mixer (monitor out, line out, or a similar output) to the balanced Input sockets using a cord equipped with standard XLR microphone connectors. Make sure the XLR connectors' terminals are configured as follows:
1= ground, 2= +, 3=-.
If you wish to connect a microphone directly to the PREMIUM PR:O active cabinet without going into a mixer first, plug it into the balanced Input socket and set its input sensitivity to Mic. Use a standard XLR microphone cord to do this. Make sure the XLR connectors' terminals are configured as follows:
1= ground, 2= +, 3=-.
1.3 Operating Speakers
- First make sure the powered cabinet is off. CAUTION! Make sure the local mains voltage matches the PREMIUM PR:O active cabinet's specified voltage. If you connect the PREMIUM PR:O cab to the wrong mains voltage, you may destroy its electronic components.
- Back the Gain and Line/Mic knobs all the way off, turning them counterclockwise as far as they will go.
When connecting line signals, be sure to first switch on all other connected components first; that is, the connected mixer and signal sources patched into it, such as keyboards, instrument amps, effects and so forth.
Confirm that the PREMIUM PR:O powered enclosure's Mic/Line control is set to the correct mode, the standard mode being Line.
Again, always switch on the PREMIUM PR:O active cabinet last, that is, after you switch on all connected devices. After you power the system up by engaging the Power switch, a system check prompts the fan to briefly kick on and back off again in about five seconds. The fan is temperature-controlled, actuating only at very high volumes and temperatures requiring cooling.
After you power up the cab by engaging the Power switch, the Power LED lights up green when the cabinet receives mains power. Set the Gain Line In knob to the center or 12 o'clock position (= 0 dBV). This is the preferred level if you have connected a mixer to the PREMIUM PR:O active cabinet. If you are patching a CD player or keyboard straight into the cab, turn the Gain Line In knob clockwise all the way to the far right to achieve maximum volume. If the input signal is still too weak, boost the level at the signal source, for instance, by adjusting an MP3 player's volume knob.
If necessary, you can turn the PREMIUM PR:O powered enclosure's Gain knob counterclockwise to the far left position and then press the Mic/Line button. This boosts the input signal by 30 dB. Then adjust the input gain by slowly turning the Gain knob to the right until you attain the desired volume. For the best audio results, ensure the Limiter LED (red) does not light up continuously.
1.4 Settings
Adjusting volume with the Gain knob
Twist this knob and engage the Mic/Line switch line to adjust microphone and line signal levels.
If you hear distortion or saturated signals, first check the signal sources and, if possible, reduce the output signal level there. If you cannot adjust the level of the signal routed to the PREMIUM PR:O active cabinet at the source, match it to the power amps by backing off the Gain Line In knob.
CAUTION: Never tape over the plug's ground terminal - this endangers lives!
Tone (not available on the PR:O 12 MA)
Starting at the center or 12 o'clock position, you can EQ the sonic image by turning the knob to the right or left. Set it to „Music“ to attenuate midrange frequencies somewhat and boost the low range frequencies for live or CD signals.
Setting the knob to „Speech“ enhances intelligibility for public address purposes. A corrective circuit automatically compensates for EQ, balancing out the overall volume for each setting.
1.5 Alignment
HK Audio DuoTilt™
(apart from the PR:O 12 MA, HK Audio Mono Tilt™ with a 3° angle tilt for the PR:O 8 A)
natural_image
Silhouette of a group of people standing under a spotlight with a camera on a tripod (no text or symbols)The HK AUDIO DuoTilt™ pole mount lets you align PREMIUM PR:O active cabinets along the horizontal plane to prevent or reduce troublesome ceiling reflections. The front aperture of the HK AUDIO DuoTilt™ provides a 3° angle, the rear aperture a 7° angle of tilt.
If you set the full-range cabinets on a fully extended cabinet tripod or mounting pole, opt for the 7° angle. This setting works especially well when addressing fewer listeners standing close to the speakers. If you wish to address more listeners further from the speakers, opt for the 3° angle on the HK AUDIO DuoTilt™.
Curving cable (for the PR:O 8 A only)
Included you'll find a curving cable. It aligns the PR:O 8 A vertically, for instance, if you wish to install the enclosure or mount it to a from a truss. Simply attach it using the bolts at the bottom of the cabinet's housing.
Attaching the curving cable:
The curving cable lets you precisely aim the flown PR:O 8 A cab.
It attaches to the back of the PR:O 8 A.
- Remove the bottom two bolts from the connector panel.
- Place the washers over the two holes.
- Insert the bolts to fasten the two plates attached to the curving cable to the cabinet at a 45^ angle (refer to the diagram).
Note: The plates must be aligned to a 45° angle to ensure safe operation!
- Tighten the bolts.
The cable kit includes:
- two washers
- two 5x25 mm recessed hex-head bolts
- one cable with mounting plates
Caution: The curving cable serves solely to tilt the cabinet; it is not a rigging point!
2 PR:O 18 Sub A, PR:O 210 Sub A
2.1 Control Features
1 Out L / Out R (Line Out Mid / High)
These two electronically balanced XLR inputs serve to connect PREMIUM PR:O satellites (pin 1= ground, 2= +, 3= -).
2 Input L / Input R
These two electronically balanced XLR / 1/4" combi inputs accept signals from mixing consoles (pin 1= ground, 2= +, 3= -).
3 Through L / Through R
These two parallel outputs patch incoming line signals through, for example, to other PREMIUM PR:O active speakers or monitors (pin 1= ground, 2= +, 3= -).
4 Gain Bass
This knob adjusts the input level (center position = 0 dBV).
The 12 o'clock position is the ideal starting point when operating the subwoofer in combination with a PREMIUM PR:O active cabinet. Then you can simply twist the knob to the left or right to cut and boost bass frequencies. If you connect a PREMIUM PR:O satellite, first set the Gain knob to the center detent and then adjust the level to suit the given sound reinforcement situation.
5 X-Over-Bass
The active crossover can serve to vary the top cutoff frequency of the subwoofer with a range of 75 to 150 Hz. The best cutoff frequency for the given application depends on the surroundings and satellite, so you will have to experiment.
Note: If you set the cutoff to a frequency higher than 110 Hz, the subwoofer will render mostly the lower frequencies of signals generated by bass guitars, kick drums, and low-end keyboard sounds. If you set the cutoff to a frequency higher than 110 Hz, the subwoofer will also render the lower frequencies of voices and other sound sources.
6 Phase
The Phase switch changes the subwoofer's phase position to match it to the connected satellite's phase position (0° – 180°). Set the switch to 0° when operating the PR:O 18 Sub A in combination with a PREMIUM PR:O active cabinet. The PR:O 210 Sub A's phase has to be reversed 180° to ensure it is in phase with PREMIUM PR:O mid-/high-range units. You may have to invert the phase for combinations with other enclosures. If you are unsure, simply try the 180° setting. If the bass response changes and the signal sounds weak and washed out, the phase setting is incorrect.
7 Limiter Status LED
This dichromic LED indicates the signal level and limiter status. Green means the signal level is okay; red means the limiter has engaged and is responding to high-volume signal peaks.
CAUTION! This is not a clip LED. It's okay if it lights up red briefly every now and then; this merely indicates the RMS Limiter is operating. If the signal LED remains constantly in the red at signal peaks, check the source signal's input level and back off the speaker's Gain knob. A status LED that lights up red continuously indicates there is a fault in the speaker system.
8 Power Switch
This is the PREMIUM PR:O powered cabinet's on/off button. The signal LED lights up green to indicate the cab is powered up. Note: The Power button is embedded to prevent unintentional actuation. Set to Power On, the button sits almost flush with the connector panel. This ensures it is not engaged accidentally, yet remains readily accessible.
9 Mains Input
Use the factory-included mains cord to connect this socket to a wall outlet. Note: All PREMIUM PR:O active speakers are equipped with V-Lock mains sockets. If you use a VOLEX locking mains cord or another optionally available brand with the same design, you can fix the mains cord in place to prevent accidental disconnection.
2.2 Setting Up and Connecting the Cabinet
Connect cords routed from your mixer (monitor out, line out, or a similar output) to the balanced Input sockets using a cord equipped with standard XLR microphone connectors. Then connect the active satellites to the XLR outputs labeled X-Over Out. Use the two Through ports to feed the fullrange signal to other enclosures. Make sure the XLR connectors' terminals are configured as follows: 1= ground, 2= +, 3= -. If only one Input signal is available, select "Input L". To get full power out of the system, connect "Through L" with "Input R" via XLR cords.
2.3 Operating Speakers
- First make sure the powered cabinet is off.
CAUTION! Connect the cabinet to the mains supply only after you are certain the local mains voltage matches the voltage specified on the rear panel. If you connect the system to the wrong mains voltage, you may destroy the electronic components of the PREMIUM PR:O active cabinet.
- Back the Gain knobs all the way off, turning them counterclockwise as far as they will go. Ensure you first switch on all other connected components, for example, a connected mixing console as well as all signal sources patched into it, such as keyboards, instrument amps, effects and so forth. Always connect PREMIUM PR:O active cabinets to Line Out Mid/High, and always switch them on last; that is, after you switch on all other connected components. When you powering down, first turn the Gain knobs to the far left and switch active cabinets off first, before switching off any connected devices.
After you power the system up by engaging the Power switch, a system check prompts the fan to briefly kick on and back off again in about five seconds. The fan is temperature-controlled, actuating only at very high volumes and temperatures requiring cooling.
- The Power LED lights up green when the cabinet receives mains power.
Set the Gain Line In knob to the center or 12 o'clock position (= 0 dBV). This is the preferred level if you have connected a mixer to the PREMIUM PR:O active cabinet. You can boost the input level 6 dB by turning up the Gain knob.
For the best audio results, ensure the Limiter LED (red) does not light up continuously.
2.4 Settings
Adjusting volume with the Gain knob
Twist this knob to adjust microphone and line signal levels.
CAUTION: Never tape over the plug's ground terminal – this endangers lives!
If you hear distortion or saturated signals, first check the signal sources and, if possible, reduce the output signal level there. If you cannot adjust the level of the signal routed to the PREMIUM PR:O active cabinet at the source, match it to the power amps by backing off the Gain knob to lower the input level.
3 Tips and Tricks
1 Do not expose electronic circuitry to moisture! Protect cabinets against rain when you set them up outdoors. Keep soft drinks, beer, and any other liquids away from the electronic components to prevent short circuits.
2 PREMIUM PR:O active enclosures provide optimum sound to you, so be sure to provide optimum input signals to them! Noise such as humming is generally caused by defective cables, the wrong type of cords, or unbalanced signals routed into the mixing console. Check all signal and mains cables.
3 Prevent distortion! Not only is it unpleasant to your audience's ears, it also endangers your equipment. Make sure all components that are connected directly and indirectly to PREMIUM PR:O active cabinets have sufficient power ratings, and that they don't distort because they're running at their respective limits. Ensure all sources deliver clean audio signals.
4 Avoid ground loops! Annoying humming can arise even within audio systems with balanced circuits, for example, when the mixing console's mains cord isn't connected and grounded to the same mains circuit as PREMIUM PR:O active enclosures. Using two different ground circuits can create a ground loop. To prevent this problem, always connect PREMIUM PR:O active enclosures and the mixing console to the same electrical circuit; that is, the same phase!
CAUTION: Never tape over the plug's ground terminal - this endangers lives!
4 Troubleshooting
The POWER LED does not light up when switched on.
- Check if the mains cord is plugged into the Mains Input.
- Check if the mains power supply is providing current.
The Power LED lights up red, flashing intermittently.
- The Limiter has actuated; lower the input level if necessary.
The Power LED lights up red continuously, but no sound is issuing from the cabinet.
- The enclosure's protective circuit has tripped. Please contact your authorized dealer.
The rendered music sounds distorted.
- Check your mixing console's LED meters. They should not be constantly in the red. If necessary, back off the volume at the mixer.
- If the LED displays on your mixer are in the green, back off the PREMIUM PR:O active cabinet's Gain knob.
- Observe the Limiter LEDs on the PREMIUM PR:O active enclosure's control panel. These may light up red, but only intermittently. The red light may not illuminate continuously. If it does, turn down the Gain knob
PREMIUM PR:O active System Configurations
active, stereo active/passive, mono
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A or
2 x PR:0 15 XA
PR:0 8 A + PR:0 8 or
PR:0 10 XA + PR:0 10 XA or
PR:0 12 A + PR:0 12 or
PR:0 15 A + PR:0 15 or
PR:0 15 XA + PR:0 15 X
Monitoring
PR:0 10 XA + PR:0 10 X
or
PR:0 12 MA + PR:0 12 M
Systems
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A
+ 2 x PR:0 18/210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 18 Sub A
5 Technical Specifications
| PR:0 8 A | PR:0 10 XA | PR:0 12 A | PR:0 12 MA | PR:0 15 A | PR:0 15 XA | PR:0 18 Sub A | PR:0 210 Sub A | |
| Frequency response +/- 3 dB: | 89 Hz - 19 kHz | 89 Hz - 19 kHz | 85 Hz - 19 kHz | 85 Hz - 19 kHz | 55 Hz - 19 kHz | 55 Hz - 19 kHz | 48 Hz - fx | 60 Hz - fx |
| Frequency response -10 dB: | 63 Hz - 19 kHz | 67 Hz - 19 kHz | 78 Hz - 19 kHz | 78 Hz - 19 kHz | 48 Hz - 19 kHz | 48 Hz - 19 kHz | 38 Hz - fx | 40 Hz - fx |
| Max SPL (Half Space): | 118 dB | 121 dB | 123 dB | 123 dB | 123 dB | 123 dB | 125 dB | 123 dB |
| Loudspeakers: | ||||||||
| Bass / midrange woofer | 8" | 10" | 12" | 12" | 15" | 15" | 18" | 2x 10" |
| High-frequency driver | 1" | 1" | 1" | 1" | 1" | 1" | - | - |
| HF protection (passive): | Dyn. protective circuit | Dyn. protective circuit | Dyn. protective circuit | Dyn. protective circuit | Dyn. protective circuit | Dyn. protective circuit | Dyn. protective circuit | Dyn. prot. circuit |
| Horn directivity: | 80° x 80 CD horn | 90° x 60 CD horn | 60° x 40 CD horn | 60° x 40° CD horn | 60° x 40° CD horn | 60° x 40° CD horn | - | - |
| Power amps: | 1x 600 W | 1x 600 W | 1x 600 W | 1x 600 W | 1x 600 W | 1x 600 W | 1x 600 Watt | 1x 600 Watt |
| Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | Class D - 4 ohms | |
| Limiters: | ||||||||
| RMS Limiter | yes | yes | yes | yes | yes | yes | no | no |
| Peak Limiter | yes | yes | yes | yes | yes | yes | no | no |
| Subsonic Filter: | 35 Hz | 35 Hz | 35 Hz | 68 Hz | 35 Hz | 35 Hz | 35 Hz | 35 Hz |
| Cutoff frequency of the active crossover (12 dB/ octave) | - | - | - | - | - | - | 75 - 150 Hz variable | 75 - 150 Hz variable |
| EQ: | Tone knob | Tone knob | Tone knob | - | Tone knob | Tone knob | - | - |
| Connectors: | ||||||||
| Line/Mic combi jack balanced: | 1x combi XLR/1/4" | 1x combi XLR/1/4" | 1x combi XLR/1/4" | 1x combi XLR/1/4" | 1x combi XLR/1/4" | 1x combi XLR/1/4" | 2x combi XLR/1/4" | 2x combi XLR/1/4" |
| Through, balanced: | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 2x XLR Through | 2x XLR Through |
| Out, balanced: | - | - | - | - | - | - | 2x XLR L/R Out Mid/High | 2x XLR L/R Out Mid/High |
| Parallel Speaker Out* | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | - | - |
| Pole mount: | MonoTiltTM | DuoTilt 3/7 | DuoTilt 3/7 | - | DuoTilt 3/7 | DuoTilt 3/7 | M20 threaded base plate | 2x M20 thread. base plate |
| Rigging points: | 2x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | - | - |
| Weight: | 11 kg / 24.3 lbs. | 13,9 kg / 30.6 lbs. | 19,5 kg / 43 lbs. | 17,1 kg / 37,7 lbs. | 23,5 kg / 51,8 lbs. | 22,4 kg / 49,4 lbs. | 39,8 kg / 87,8 lbs. | 27,2 kg / 55 lbs. |
| Dimensions (WxHxD) | 27 x 42 x 27 cm | 32 x 48 x 29 cm | 39 x 57 x 36 cm | 39 x 55,5 x 38 cm | 47 x 61,5 x 41,5 cm | 47 x 61,5 x 44,5 cm | 53 x 61 x 64 cm | 36 x 61 x 53 cm |
*) Min impedance 8 ohm/300 W
PREMIUM PR:0
1 Gain
9 Parallel Speaker Out
natural_image
Silhouette of a group of people standing under a spotlight, with a camera and tripod visible (no text or symbols)1 Out L / Out R (Line Out Mid / High)
active, stereo active/passive, mono
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A or
2 x PR:0 15 XA
PR:0 8 A + PR:0 8 or
PR:0 10 XA + PR:0 10 XA or
PR:0 12 A + PR:0 12 or
PR:0 15 A + PR:0 15 or
PR:0 15 XA + PR:0 15 X
Monitoring
PR:0 10 XA + PR:0 10 X
or
PR:0 12 MA + PR:0 12 M
Systems
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A
+ 2 x PR:0 18/210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 18 Sub A
1 Gain
9 Parallel Speaker Out
natural_image
Silhouette of a group of people standing under a spotlight, with a camera and tripod visible (no text or symbols)1 Out L / Out R (Line Out Mid / High)
active, stereo active/passive, mono
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A or
2 x PR:0 15 XA
PR:0 8 A + PR:0 8 or
PR:0 10 XA + PR:0 10 XA or
PR:0 12 A + PR:0 12 or
PR:0 15 A + PR:0 15 or
PR:0 15 XA + PR:0 15 X
Monitoring
PR:0 10 XA + PR:0 10 X
or
PR:0 12 MA + PR:0 12 M
Systems
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A
+ 2 x PR:0 18/210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 18 Sub A
5 Caractéristiques techniques
Description PR:0 8 A PR:0 10 XA PR:0 12 A PR:0 12 MA PR:0 15 A PR:0 15 XA PR:0 18 Sub A PR:0 210 Sub A
1 Gain
9 Parallel Speaker Out
natural_image
Silhouette of a group of people standing under a spotlight, with a camera on a tripod nearby (no text or symbols)Cavo-curving (soltanto PR:O 8 A)
1 Out L / Out R (Line Out Mid / High)
Due ingressi XLR a simmetria elettronica per collega re top PREMIUM PR:O (pin 1= Ground, 2= +, 3= -).
2 Input L / Input R
active, stereo active/passive, mono
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A or
2 x PR:0 15 XA
PR:0 8 A + PR:0 8 or
PR:0 10 XA + PR:0 10 XA or
PR:0 12 A + PR:0 12 or
PR:0 15 A + PR:0 15 or
PR:0 15 XA + PR:0 15 X
Monitoring
PR:0 10 XA + PR:0 10 X
or
PR:0 12 MA + PR:0 12 M
Systems
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A
+ 2 x PR:0 18/210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 18 Sub A
5 Caratteristiche tecniche
Tipo PR:0 8 A PR:0 10 XA PR:0 12 A PR:0 12 MA PR:0 15 A PR:0 15 XA PR:0 18 Sub A PR:0 210 Sub A
| Risposta in freq. +/- 3dB: | 89 Hz - 19 kHz | 89 Hz - 19 kHz | 85 Hz - 19 kHz | 85 Hz - 19 kHz | 55 Hz - 19 kHz | 55 Hz - 19 kHz | 48 Hz - fx | 60 Hz - fx |
| Risposta in freq. -10 dB: | 63 Hz - 19 kHz | 67 Hz - 19 kHz | 78 Hz - 19 kHz | 78 Hz - 19 kHz | 48 Hz - 19 kHz | 48 Hz - 19 kHz | 38 Hz - fx | 40 Hz - fx |
| Max SPL (Half Space): | 118 dB | 121 dB | 123 dB | 123 dB | 123 dB | 123 dB | 125 dB | 123 dB |
| Altoparlanti: | ||||||||
| Bass / Mid: | 8" | 10" | 12" | 12" | 15" | 15" | 18" | 2x 10" |
| Driver acuti: | 1" | 1" | 1" | 1" | 1" | 1" | - | - |
| Protezione (passiva): | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. | Circuito di prot. din. |
| Caratteristiche della tromba: | 80° x 80 tromba CD | 90° x 60 tromba CD | 60° x 40 tromba CD | 60° x 40° tromba CD | 60° x 40° tromba CD | 60° x 40° tromba CD | - | - |
| Sezione finale di potenza: | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt | 1x 600 Watt |
| Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | Class D - 4 Ohm | |
| Limiter: | ||||||||
| RMS- Soundlimiter: | si | si | si | si | si | si | no | no |
| Peak Schutzlimiter: | si | si | si | si | si | si | si | si |
| Filtro subsonic: | 35 Hz | 35 Hz | 35 Hz | 68 Hz | 35 Hz | 35 Hz | 35 Hz | 35 Hz |
| Frequenza di separazione del filtro divisore attivo: | - | - | - | - | - | - | 75 – 150 Hz regolabile | 75 – 150 Hz regolabile |
| (12 dB/Ottava) | ||||||||
| Regolazione di tonalità: | controllo Tone | controllo Tone | controllo Tone | - | controllo Tone | controllo Tone | - | - |
| Collegamenti: | ||||||||
| Line/Mic In: | 1x presa combinata | 1x presa combinata | 1x presa combinata | 1x presa combinata | 1x presa combinata | 1x presa combinata | 2x presa combinata | 2x presa combinata |
| simmetrico | ||||||||
| Through, simmetrico: | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 2x XLR Through | 2x XLR Through |
| Out, simmetrico: | - | - | - | - | - | - | 2x XLR L/R Out Mid/High | 2x XLR L/R Out Mid/High |
| Parallel Speaker Out* | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | - | - |
| Flangia di supporto: | MonoTiltTM | DuoTilt 3/7 | DuoTilt 3/7 | - | DuoTilt 3/7 | DuoTilt 3/7 | flangia filettata M20 | 2x flangia filettata M20 |
| Punti da rigging: | 2x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | - | - |
| Peso: | 11 kg / 24.3 lbs. | 13,9 kg / 30.6 lbs. | 19,5 kg / 43 lbs. | 17,1 kg / 37,7 lbs. | 23,5 kg / 51,8 lbs. | 22,4 kg / 49,4 lbs. | 39,8 kg / 87,8 lbs. | 27,2 kg / 55 lbs. |
| Dimensioni (LxAxP): | 27 x 42 x 27 cm | 32 x 48 x 29 cm | 39 x 57 x 36 cm | 39 x 55,5 x 38 cm | 47 x 61,5 x 41,5 cm | 47 x 61,5 x 44,5 cm | 53 x 61 x 64 cm | 36 x 61 x 53 cm |
*) Min Impedance 8 Ohm, 300 Watt
PREMIUM PR:0
9 Parallel Speaker Out
natural_image
Silhouette of a group of people standing under a spotlight with a camera on a tripod (no text or symbols)1 Out L / Out R (Line Out Mid / High)
active, stereo active/passive, mono
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A or
2 x PR:0 15 XA
PR:0 8 A + PR:0 8 or
PR:0 10 XA + PR:0 10 XA or
PR:0 12 A + PR:0 12 or
PR:0 15 A + PR:0 15 or
PR:0 15 XA + PR:0 15 X
Monitoring
PR:0 10 XA + PR:0 10 X
or
PR:0 12 MA + PR:0 12 M
Systems
2 x PR:0 8 A or
2 x PR:0 10 XA or
2 x PR:0 12 A or
2 x PR:0 15 A
+ 2 x PR:0 18/210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 210 Sub A
4 x PR:0 8 A
+ 2 x PR:0 18 Sub A
5 Datos técnicos
Denominación PR:0 8 A PR:0 10 XA PR:0 12 A PR:0 12 MA PR:0 15 A PR:0 15 XA PR:0 18 Sub A PR:0 210 Sub A
| Respuesta de frecuencia: | ||||||||
| +/- 3dB: | 89 Hz - 19 kHz | 89 Hz - 19 kHz | 85 Hz - 19 kHz | 85 Hz - 19 kHz | 55 Hz - 19 kHz | 55 Hz - 19 kHz | 48 Hz - fx | 60 Hz - fx |
| -10 dB: | 63 Hz - 19 kHz | 67 Hz - 19 kHz | 78 Hz - 19 kHz | 78 Hz - 19 kHz | 48 Hz - 19 kHz | 48 Hz - 19 kHz | 38 Hz - fx | 40 Hz - fx |
| Max SPL (medio espacio): | 118 dB | 121 dB | 123 dB | 123 dB | 123 dB | 123 dB | 125 dB | 123 dB |
| Altavoces: | ||||||||
| Bass / Mid: | 8" | 10" | 12" | 12" | 15" | 15" | 18" | 2x 10" |
| Driver de agudos: | 1" | 1" | 1" | 1" | 1" | 1" | - | - |
| Protección de tonos agudos: | ||||||||
| (pasiva) | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn | Circuito protector Dyn |
| Característica de bocina: | 80° x 80 CD bocina | 90° x 60° CD bocina | 60° x 40 CD bocina | 60° x 40° CD bocina | 60° x 40° CD bocina | 60° x 40° CD bocina | - | - |
| Etapas finales: | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios | 1x 600 vatios |
| Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | Class D - 4 Ohmios | |
| Limitador: | ||||||||
| Limitador de sonido RMS: | si | si | si | si | si | si | no | no |
| Limitador protector de picos: | si | si | si | si | si | si | si | si |
| Filtro subsónico: | 35 Hz | 35 Hz | 35 Hz | 68 Hz | 35 Hz | 35 Hz | 35 Hz | 35 Hz |
| Frecuencia de separación de crossover: (12 dB octavo) | - | - | - | - | - | - | 75-150 Hz seleccionable | 75-150 Hz seleccionable |
| Regulación de sonido: | Regulador de tonos | Regulador de tonos | Regulador de tonos | - | Regulador de tonos | Regulador de tonos | - | - |
| Conexiones: | ||||||||
| Line/Mic In: | 1x Con.hembra combin. | 1x Con.hembra combin. | 1x Con.hembra combin. | 1x Con.hembra combin. | 1x Con.hembra combin. | 1x Con.hembra combin. | 2x Con.hembra combin. | 2x Con.hembra combin. |
| simétrica | ||||||||
| Through, simétrica: | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 1x XLR Through | 2x XLR Through | 2x XLR Through |
| Out, simétrica: | - | - | - | - | - | - | 2x XLR L/R Out Mid/High | 2x XLR L/R Out Mid/High |
| Parallel Speaker Out* | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | 1x Speakon | - | - |
| Brida para soporte en altura: | MonoTiltTM | DuoTilt 3/7 | DuoTilt 3/7 | - | DuoTilt 3/7 | DuoTilt 3/7 | Brida roscada M20 | 2x Brida roscada M20 |
| Puntos de sujeción | 2x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | 3x M8 | - | - |
| Peso: | 11 kg / 24.3 lbs. | 13,9 kg / 30.6 lbs. | 19,5 kg / 43 lbs. | 17,1 kg / 37,7 lbs. | 23,5 kg / 51,8 lbs. | 22,4 kg / 49,4 lbs. | 39,8 kg / 87,8 lbs. | 27,2 kg / 55 lbs. |
| Dimensiones (axAxP): | 27 x 42 x 27 cm | 32 x 48 x 29 cm | 39 x 57 x 36 cm | 39 x 55,5 x 38 cm | 47 x 61,5 x 41,5 cm | 47 x 61,5 x 44,5 cm | 53 x 61 x 64 cm | 36 x 61 x 53 cm |
*) impedancia 8 Ohmios, 300 Vatios
PREMIUM PR:0
HK Audio® • Postfach 1509 • 66595 St. Wendel • Germany • info@hkaudio.com • www.hkaudio.com
International Inquiries: fax +49-68 51-905 215 • international@hkaudio.com
- Manual 1.6
- PREMIUM PR:0
- Important Safety Instructions! Read before connecting!
- General Notes on Safety for Loudspeaker Systems
- Welcome to the HK Audio family!
- Thank you for choosing (yet another) HK Audio product!
- Warranty
- HK AUDIO
- Table of contents
- Digital Amping - Enhanced efficiency and dynamics
- RMS/Peak-Limiter
- Subsonic-Filter - Protection against low-frequency rumble
- DuoTilt 3/7™ - Making the most of sonic energy
- PR:O 8 A, PR:O 10 XA, PR:O 12 A, PR:O 12 MA PR:O 15 A, PR:O 15 XA
- Control Features
- Gain
- Tone (not available on the PR:O 12 MA)
- Mic/Line Switch (not on the PR:O 12 MA)
- Input
- Through
- Limiter Status LED
- Power Switch
- Mains Input
- Parallel Speaker Out
- Setting Up and Connecting Cabinets
- Operating Speakers
- Settings
- Adjusting volume with the Gain knob
- Tone (not available on the PR:O 12 MA)
- Alignment
- HK Audio DuoTilt™
- Curving cable (for the PR:O 8 A only)
- Attaching the curving cable:
- PR:O 18 Sub A, PR:O 210 Sub A
- Control Features
- Out L / Out R (Line Out Mid / High)
- Input L / Input R
- Through L / Through R
- Gain Bass
- X-Over-Bass
- Phase
- Limiter Status LED
- Power Switch
- Mains Input
- Setting Up and Connecting the Cabinet
- Operating Speakers
- Settings
- CAUTION: Never tape over the plug's ground terminal – this endangers lives!
- Tips and Tricks
- Troubleshooting
- The POWER LED does not light up when switched on.
- The Power LED lights up red, flashing intermittently.
- The Power LED lights up red continuously, but no sound is issuing from the cabinet.
- The rendered music sounds distorted.
- PREMIUM PR:O active System Configurations
- Cavo-curving (soltanto PR:O 8 A)
Brand : HK AUDIO
Model : PR:O 8
Category : Loudspeaker