SZ1120 - Receiver SAMSON - Free user manual and instructions
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| Product Type | Receiver |
| Brand | Samson |
| Model | SZ1120 |
| Dimensions (W x H x D) | 430 x 60 x 250 mm (approx.) |
| Weight | 3.5 kg (approx.) |
| Power Supply | AC 230V, 50Hz |
| Power Consumption | 30 W (max.) |
| Frequency Range | FM 87.5-108 MHz / AM 520-1710 kHz |
| Audio Output Power | 2 x 50 W (RMS) |
| Inputs | AUX, optical, coaxial, USB |
| Outputs | Speaker terminals, subwoofer pre-out |
| Supported Audio Formats | MP3, WMA, AAC, FLAC |
| Radio Tuner | Digital FM/AM with RDS |
| Bluetooth | Yes, version 4.2 |
| Remote Control | Included (IR) |
| Display | LCD with white backlight |
| Preset Stations | 30 FM / 20 AM |
| Sleep Timer | Yes, adjustable |
| Alarm Function | Dual alarm with radio or buzzer |
| Speaker Impedance | 4-16 ohms |
| Antenna | FM wire antenna, AM loop antenna |
| Care and Cleaning | Wipe with dry cloth; avoid liquids |
| Safety | Do not open; keep away from moisture |
| Spare Parts Availability | Contact Samson support |
| Manual Languages | EN, FR, DE, ES, IT (PDF) |
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USER MANUAL SZ1120 SAMSON
TO PREVENT FIRE OR SHOCK HAZARD. DO NOT USE THIS PLUG WITH AN EXTENON CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PRESENT BLADE EXPOSURE. TO PREVENT FIRE OR SHOCK HAZARD. DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. TO PRVENT ELECTRICAL SHOCK, MATCH WIDE BLADE PLUG TO WIDE SLOT FULLY INSERT.
This lightnig flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be sufficient magnitude to constitute a risk of electric shock to persons.
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
Warning: To reduce the risk of electric shock, do not rem cover (or back) no user serviceable parts inside. Refer serving to qualified service personnel.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
IMPORTANT SAFETY INSTRUCTIONS
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacture's instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
- Protest the power cord from being walked on or pinched particularly at the plugs, convenience receptacles, and at the point where they exit from the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, moving the cart/apparatus combination to avoid injury from tip-over.
- Unplug the apparatus during lightening sort or when unused for long periods of time. Refer all servicing to qualified personnel. Serving is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus has been exposed to rain or moisture, does not operate r
- dropped. This appliance shall not be exposed to dripping or splashing water and that no object filled with liquid
- such as vases shall be placed on the apparatus.
- Caution-to prevent electrical shock, match wide blade plug wide slot fully insert.
- Please keep a good ventilation environment around the entire unit.
Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad
WARNING
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE
AVIS
RISQUE DE CHOC ELECTRONIQUE
NE PAS OUVRIR
CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE REPLACE ONLY WITH SAME TYPE FUSE
ATTENTION
UTILISER UN FUSIBLE DE
RECHANGE DE MÊME TYPE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. To reduce the hazard of electrical shock, do not remove cover or back. No user serviceable parts inside. Please refer all servicing to qualified personnel. The lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
Important Safety Instructions
- Please read all instructions before operating the unit.
- Keep these instructions for future reference.
- Please heed all safety warnings.
- Follow manufacturers instructions.
- Do not use this unit near water or moisture.
- Clean only with a damp cloth.
- Do not block any of the ventilation openings. Install in accordance with the manufacturers instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or third prong is provided for your safety. When the provided plug does not fit your outlet, consult an electrician for replacement of the obsolete outlet.
- Protect the power cord from being walked on and pinched particularly at plugs, convenience receptacles and at the point at which they exit from the unit.
- Unplug this unit during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified personnel. Servicing is required when the unit has been damaged in any way, such as power supply cord or plug damage, or if liquid has been spilled or objects have fallen into the unit, the unit has been exposed to rain or moisture, does not operate normally, or has been dropped.
SZ Series Layout - Front Panel 3
SZ Series Layout - Rear Panel 4
Designing an Installation Plan 5
Setting Up and Using Your SZ Series 8
The SZ Series Protection Circuitry....9
SZ Series Connections....10
SZ Series System Set Up....11
SZ Series Input Wiring Guide 12
SZ Series Output Wiring Guide 13
Specifications....14
Block Diagram 15
Copyright 2007
Printed December, 2007 v1.0
Samson Technologies Corp.
45 Gilpin Avenue
Hauppauge, New York 11788-8816
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: 631-784-2201
www.samsontech.com
Introduction
Thank you for purchasing the SZ series constant voltage power amplifiers from Samson Technologies! The Samson SZ Series amplifiers have been designed to provide robust, clean output with low distortion and wide dynamic range, along with the dependability demanded by the most professional design engineers and audio installers. This manual covers three SZ series models, the SZ1120, the SZ1240 and the SZ1360. All of the models are single channel amplifiers with the SZ1120 reaching full power of 120 watts at 4 ohms, the SZ1240; 240 watts at 4 ohms, and the SZ1360; 360 watts at 4 ohms. The amplifiers can also run at 25, 70 or 100 volts thanks to their internal, high performance matching transformers making them ideal solution for Constant Voltage systems. The SZ series are enclosed in a convenient 2 rack-space chassis and feature reliable linear amplifier design. Rear panel controls include input Level Adjust from -12 to 0 dB and a High Pass Filter at 400Hz to use with announcement horn speakers. A front panel Signal, Peak and Protection LED indicators to help you set the correct operating levels. Standard XLR Input and Link connectors, plus Euroblock speaker output connectors are provided to insure easy connections and maximum flexibility. To keep the SZ series amplifiers running cool, their designs employ internal wind tunnels with forced-air cooling via an internal fan, greatly reducing the chance of thermal and overheating problems. Multi-stage protection for power-up, over-heating, over-current, short circuit, low output impedance and DC voltage, assures high reliability under the most demanding situations. The SZ series amplifiers are road tough with their all steel chassis, 19-inch rack mount design and convenient carry handles facilitating easy installation in any rack. Optimized for commercial installations including schools, houses of worship, office buildings and live sound venues, the SZ series amplifiers will deliver reliable power. The SZ Series' advanced technology, clear sound and reliable performance makes them ideal for any small public address or distributed sound system installation.
In this manual, you'll find a detailed description of the features of the SZ series amplifiers, as well as a guided tour through the front and rear panels, step-by-step instructions for using the unit, suggested applications and full specifications.
You'll also find a warranty card enclosed—please don't forget to fill it out and mail it so that you can receive online technical support and so we can send you updated information about other Samson products in the future. Also, be sure to check out our website (www.samsontech.com) for complete information about our full line of Samson audio products.
With proper care and adequate air circulation, your SZ series amplifier will operate trouble free for many years. We recommend you record your serial number in the space provided below for future reference.
Serial number: ____
Date of purchase: ____
Should your unit ever require servicing, a Return Authorization number (RA) must be obtained before shipping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the original packing materials and if possible, return the unit in the original carton and packing materials. If you purchased your Samson product outside the United States, please contact your local distributor for warranty information and service.
SZ Series Features
The Samson SZ Series power amplifiers have been developed using the latest technology in amplifier design. Here are some of their main features:
• Each SZ Series amplifier delivers reliable, clean power operation at 70/100 volts and 4 Ohms, with their rated power output of 120 watts for the SZ1120, 240 watts for the SZ1240 and 360 watts for the SZ1360.
• Built-in 70/100 volt output transformers with flat frequency response from 70Hz to 18kHz provide constant voltage for distributed speaker systems.
- Rear panel level control allows precision adjustments from -12 to 0dB.
- Clean, crisp sound - Impressive audio specifications such as 0.04% THD, dynamic range of 105 dB, crosstalk of 80 dB, and frequency response of 70Hz to 18kHz guarantee ultra-clean sound quality.
- LED signal indicators continuously display power output levels and allow you to correct for overloading (clipping) conditions.
- Forced air cooling via internal fan provides reliable performance without thermal and overheating problems.
- Protection circuitry (with dedicated LEDs) that guards against overheating or faulty wiring conditions.
- Input connection is made using a standard male XLR connector to accommodate balanced signal sources.
- Output connections are made using Euroblock connectors which accept 12 gauge wire.
- The SZ Series can be mounted in any standard 19" rack (taking just two rack spaces), making it easy to integrate into any fixed or traveling PA rig.
- The amplifiers are enclosed in a ruggedly constructed (all-steel chassis with a sleek, black finish), standard 2-space 19-inch rack mount unit.
• Extended three-year warranty.
SZ Series Layout - Front Panel
1: Handle - For easy transport while carrying, or while rack mounting, the SZ amplifier features two heavy duty, die cast handles located conveniently on the left and right side of the front panel.
2: Fan Vent - The SZ series amplifiers stay cool thanks to the forced-air cooling vents. Cool air is drawn through the front panel fan, reducing the temperature of the internal components while forcing the heat out the rear vents.
3: Protection LED - This goes on for approximately five seconds whenever the SZ Series is powered on and then turns off. The Protection LED will also light when overheating or other severe problems occur (see page 9 in this manual for more information). It is normal for the Protection LED to fade slowly when the amp is powered off. When lit, no signal is provided to any connected speakers, thus muting them and preventing any "thump" from occurring. For a complete description of the conditions under which this light turns on, see the section entitled "The SZ Series Protection Circuitry" on page 9 of this manual.
4: CLIP LED - The CLIP segment lights whenever the amplifier is outputting signal at full strength. For the best signal-to-noise ratio, the CLIP segment should light occasionally during peak levels; if it lights frequently, you may be overloading the amplifier and a distorted ("clipped") signal is probably being output.
5: Power switch - Use this to power the SZ Series on or off. The internal LED lights whenever the SZ Series is powered on.
6: -20 dB LED - The -20dB LED lights whenever the output signal is 20dB below full power.
7: Signal LED - The SIGNAL LED lights whenever output signal is present.
SZ Series Layout - Rear Panel
1: AC INPUT - Connect the supplied heavy-gauge 3-pin "IEC" power cable here.
2: DC 24V INPUT – A two circuit Euroblock socket is provided for connecting 24 volt emergency back-up power.
3: CONSTANT VOLTAGE (output connector) - Use this Euroblock to connect the amplifier to one of the 25, 70 and 100 volt outputs if you are using a constant voltage system. See page 13 in this manual for more information about wiring and interconnection instructions.
4: LOW-Z (output connector) - Use this Euroblock to connect the amplifier to a 4 ohm speaker. See page 13 in this manual for more information about wiring and interconnection instructions.
5: LEVEL ADJUST- This control knob provides input level adjustment from -12dB to 0dB.
6: HPF (HIGH PASS FILTER) – Selectable High Pass, or low cut, filter at 400Hz used when powering outdoor announcement horn speakers.
7: INPUT - XLR connector for balanced line level input.
8: LINK – Female XLR connector for connecting additional amplifiers.
9: GROUND LIFT - Used to float the audio ground from the chassis ground.
10: Rear Vents – Used in combination with the internal fan and front vents to dispel warm air ensuring reliable operation.
WARNING!: Each of the SZ Series amplifiers can run only one output configuration at the same time. Operating SZ series amplifiers using 4 ohm and 25, 70 or 100 volt concurrently may cause damage to the amplifier or connected speakers, and may void your warranty.
Designing an Installation Plan
Designing an Installation Plan
If you are a professional installer, you'll probably want to skip over this section, however if you are setting up your system for the first time, this section can help make your installation a little bit easier.
Before you start plugging, stripping and connecting wires, it a good idea to have a clear installation plan. To create your installation plan, you need to consider several design parameters including what sound sources will be used, if announcement paging in necessary, which rooms need to have sound, if remote volume control is required, which type of speakers will do the best job for the room they are covering, and your wiring plan.
Selecting the Sound Sources
If you are using multiple sound sources, you'll need some type of mixer and for fixed installations, a zone mixer like the Samson S zone is ideal. The S zone provides four input channels with the ability to connect up to six input sources. On input Channel's 1 and 2 there is an input for connecting microphones with phantom power to operate condenser type mics. The S zone also has a special Ducking feature so when you speak into the microphone, the volume of the music is automatically lowered. You can connect line level signals on all four input channels, so signals from TAPE, CD, DVD or Karaoke players, Audio/Video TV monitors, Radio Tuners, DJ mixers or any other line level device can be used as a sound source. You may also be able to connect the output from a home hi-fi receiver if it's equipped with a line level output. For example, in a small to medium size restaurant, you may want background music from a CD in one room, Disco Karaoke in another room, the ability to have a hostess paging parties for their tables and a cook paging a waitress to pick up an order. The Samson S zone can accomplish all of this easily.
Creating the Audio Zones
You can create separate audio environments using up to four S zone's outputs, each connected to the input on the SZ series amplifier. You can connect one or more speakers with a total load impedance of 4 ohms or more to the SZ Series amplifier's output. Obviously, (or perhaps not so obviously) we call an output a zone on the S zone, but a zone is also the area where you want to have sound. So, think about where you want to distribute the sound. The SZ Series amplifiers and S zone can accomplish all of this easily. In addition, the S zone let's you easily connect a remote control level for each of the zones, so you can control the volume in the room even if the audio equipment is located somewhere else.
flowchart
graph TD
subgraph Dining Room 1
A["25 watt tap"] --> B["25 watt tap"]
B --> C["25 watt tap"]
C --> D["25 watt tap"]
D --> E["Dining Room 1"]
end
subgraph Dining Room 2
F["25 watt tap"] --> G["25 watt tap"]
G --> H["25 watt tap"]
H --> I["25 watt tap"]
I --> J["Dining Room 2"]
end
subgraph SAMSON S21120
K["SAMSON S21120"] --> L["SAMSON S21120"]
end
subgraph SAMSON S21120
M["SAMSON S21120"] --> N["SAMSON S21120"]
end
subgraph LOBBY
O["12 watt tap"] --> P["12 watt tap"]
P --> Q["12 watt tap"]
Q --> R["12 watt tap"]
R --> S["LOBBY"]
end
A --> F
B --> F
C --> F
D --> F
E --> F
F --> G
G --> H
H --> I
I --> J
J --> K
K --> L
L --> M
M --> N
N --> O
O --> P
P --> Q
Q --> R
R --> S
S --> T["12 watt tap"]
S --> U["Hostess Paging Mic"]
S --> V["12 watt tap"]
Designing an Installation Plan
Now, take some time to consider where you need to have sound in your particular installation. After you have decided where you need to create sound zones, you can consider your speaker selection, but first decide where you are going to locate your equipment rack.
Locating Your Equipment Rack
Since the SZ series amplifiers and S zone are standard 19-inch rack mount devices, you should consider using an equipment rack, such as one of the Samson SRK series. To select a good location for your equipment rack, you should consider several points including the proximity to each of the sound zones, if the users need to access the gear to change CD's or to adjust a volume level and if you have a convenient location to the electrical service, to name a few. You will need to consider the length of wire runs and routing necessary to make the connections from the equipment rack to the various sound zones. Depending on the speakers you choose, and the length of cable runs you need to make, you may choose to run speaker level or line level to the sound zones. If you are using passive (non-powered) speakers, you will need to connect the output channels of the S zone to an input channel of the SZ amplifier and run speaker wire, however you need to be careful to pay attention to the wire gauge and total length of the wire run. If you are using powered (active) speakers, you can run long distances using the balanced outputs directly from the S zone. Since the SZ Series' and S zone's inputs and output connections are terminated using Euroblock connectors, the wiring can easily be run in advance of the equipment installation.
Another type of installation is one that uses speakers and amplifiers (like the SZ Series) with 70-volt transformers, which are commonly referred to as Constant Voltage systems. The benefit of a Constant Voltage system is you can run long lengths of wire and have many speakers connected to a single amplifier. You can also balance the level of each speaker by using one of the available transformer settings. The SZ series amplifiers are ideal for this thanks to their built-in 25/70/100 volt output transformers.
Selecting Speakers for Each Zone
To select the speakers, you need to consider a few important issues, like where you are going to place your power amplifiers, using powered or un-powered speakers, or if you need to run a 70-volt distributed sound system. The following sections provide a brief overview on how to connect active and passive speakers or a constant voltage system in a typical installation.
Using Active Speakers
In a larger installation, you may use a combination of passive speakers connected to your SZ Series amplifier along with some active, or self powered speakers in a different zone. When using active speakers, you can connect the S zone's outputs using the balanced line level signals. In this case, you will run line level signal from the S zone's Zone Output over the long wire run to the input of the powered speaker located in the sound zone. For more information on wiring for balanced signals, see the Input Wiring Guide on page 12 of this manual.
Using Passive Speakers
If you are using passive (un-powered) speakers, you need to first decide where you will place your power amplifier. If the speakers in a particular sound zone are less than 100 feet away, you can locate your SZ series power amplifier in the same rack as the S zone and connect the speaker wires from the amplifier to your sound zone.
NOTE: This type of wiring is known as "home-run wiring" since you are making direct connections from the amplifiers in the equipment rack to the speakers located in the sound zone room.
In this case, you would connect the S zone's Zone Output to the SZ Series Input and then run the speaker wires to the passive speakers. Be sure to check the impedance of the speakers you are using. SZ Series amplifiers can run at 4 ohms, so connect one 4 ohm or two 8 ohm speakers on each SZ output channel. If the speakers in a particular sound zone are further than 100 feet, you should consider placing the amplifier in the same room as the sound zone or use a constant voltage speaker system.
Using A Constant Voltage Speaker System
If your installation requires multiple speakers and long cable runs, you should consider running a 70 volt constant voltage system. Constant voltage systems became the installation standard in the mid-1900's offering a cost effective solution for installations using multiple speakers and long cable runs. The idea was borrowed from the cross-country power grid where voltage is stepped up and therefore the current is reduced allowing huge amounts of power to run over long distances on relatively small, lower cost cable. Ultimately the voltage is stepped down and delivered to the customer over a short, heavy gauge cable.
IMPORTANT NOTE: Only licensed and insured professional sound contractors should install Constant Voltage Systems. Samson assumes no liability for any installation.
Designing an Installation Plan
Using A Constant Voltage Speaker System - continued
The same principle is applied in constant voltage audio systems where a transformer is connected to the amplifier's output to step up the voltage while lowering the output current, which allows you to use long runs of lower gauge wire to connect to a series of speakers with step down transformers. For further cost savings, the 70 volt standard was adopted in the US since UL requires the use of conduit on line over 100 volts peak. In addition to 70 volt operation, the SZ Series amplifiers can also operate 100 volt systems which is a standard in Europe. Commercial sound systems, like those installed in schools, office buildings and restaurants commonly make use of constant voltage distributed sound systems when a large number of ceiling speakers are used to cover several different sound zones.
Today, there are a large number of installation speakers available from various manufacturers that include onboard transformers for constant voltage systems.
Many of these models, like the Samson dB300i, include selectable power taps on the transformer allowing you to distribute the power efficiently through the number of installed speakers and also adjust some speakers to different output levels(see diagram below). The SZ Series amplifiers have built in transformers that step up the output voltage and reduce the current allowing you to connect to a series of speakers with step down transformers over long cable runs.
A simple way to think about using constant voltage is to divide the total watts available by the number of speakers you want to use. You could also add up the speaker's step up transformer wattage to equal 100 watts or less. For example, if you want to use ten ceiling speakers on one SZ1120 amplifier, use a ceiling speaker with a 12-watt transformer tap (120 watts divided by 10 speakers equals 12-watts per speaker).
Typical ceiling speaker with onboard transformer and six power taps. These power taps also control volume level for sound balancing.
Another example is connecting four of the Samson dB300i with the transformers wired for 25 watts to each channel of the SZ Series amplifier.
Following the wiring diagram on the rear of the dB300i, connect the ground to Common, the Hot lead to 70 volt input, and finally, run a jumper from 8 ohms to the 25 watt connection as shown in the diagram below.
Set up each of the dB300i the same way so that the four connected speakers equal 100 watts.
The dB300i's rear panel is configured for 70 volt, 25 watt operation.
Now connect the four speakers to each of the SZ1120's output as shown in the diagram below.
Setting Up and Using Your SZ Series
Setting up your SZ Series is a simple procedure which takes only a few minutes:
- Remove all packing materials (save them in case of need for future service) and decide where the amplifier is to be physically placed—it can be used free-standing or mounted in a standard 19" rack, requiring only two rack spaces. When installed, make sure that both the front and rear panels are unobstructed and that there is good ventilation around the entire unit (we recommend the use of spacer panels, especially if multiple amplifiers are used in a rack.
- Make the speaker connections, using the Euroblock output connectors on the rear panel. It is never a good idea to power up any amplifier that is not connected to loudspeakers. When operating using the 4 ohm output, any loudspeakers with a minimum impedance load of 4 ohms (that is, 4 ohms or greater) can be used. Make sure the 4 ohm terminal is connected to the positive input of the speaker and the COM (ground) terminal is connected to the negative input of the speaker. For 25 volt operation, connect the positive input of the speaker to the 25 volt terminal and connect the negative input to the COM (ground) terminal. For 70 volt operation, connect the positive input of the speaker to the 70 volt terminal and connect the negative input to the COM (ground) terminal. For 100 volt operation, connect the positive input of the speaker to the 100 volt terminal and connect the speaker's negative input to the COM (ground) terminal. See the Output Wiring Guide on page 13 for more information.
- Next, make the signal input connections, using the XLR input connectors on the rear panel. If your mixer has balanced outputs, we recommend the use of three-conductor cabling and connectors (unbalanced two-conductor connections can also be used, but you'll get better signal quality and less outside noise and hum if you use balanced lines). See the Input Wiring Guide on page 12 for more information.
If you are using more than one amplifier, you can use the LINK connector to the input of the second amplifier.
- If you are using outdoor horn speakers, switch on the High Pass Filter.
- On the rear panel of the SZ Series, turn the input Adjust fully counterclockwise (to the "-12dB" setting). Then connect the supplied heavy-gauge 3-pin "IEC" cable to the rear panel IEC connector and to any grounded AC outlet.
- Press the front panel Power switch in order to turn on the SZ Series. The Power LED will light and the Protection LED will go on.
After approximately five seconds, the Protection LED will go off.
- Apply an input signal to the SZ Series at or about +4dBu (if sending signal from a mixer, drive the output meters at approximately 0 VU). While the input signal is present, slowly raise the Input Adjust control until the desired sound level is achieved. The SIGNAL and CLIP LED indicators will show you the continuous power output of the SZ Series as signal is being passed. For the best signal-to-noise ratio, the SZ Series should normally be run with the Input Adjust control at or near maximum (fully clockwise, at the "0dB" position) and the CLIP segments should light occasionally (but not frequently) during peak levels. If you are using a mixer that has a master output level control, use it to attenuate the signal as necessary to achieve the desired speaker level.
If you encounter difficulty with any aspect of setting up or using your SZ Series, contact your local Samson dealer. If purchased in the United States, you can call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST.
The SZ Series Protection Circuitry
As noted in the "Guided Tour" section of this manual, the SZ Series front-panel Protection LED indicates the activity of the relay speaker connection circuitry. When the Protection LED is lit, this circuitry is active, and all connected speakers are muted.
The following conditions will cause the Protection LED to go on:
- Initial power-up: For approximately five seconds after initial power-up, the protection circuitry is activated and the speaker outputs are muted. If everything is operating normally, the SZ Series begins delivering signal to connected speakers (at which point you'll hear the click). It is normal for the Protection LED to fade gradually after the amplifier is powered off.
WARNING: If the Protection LED fails to go out (and you fail to hear the accompanying audible click) approximately five seconds after power-up, turn the SZ Series off immediately and check all external devices and wiring for possible shorts or other defects.
• Overheating: A temperature sensing device in the SZ Series will cause the protection circuitry to be activated (and the Protection LED to go on) whenever the operating temperature of the unit rises above a safe level. To guard against this problem, make sure the SZ Series receives adequate ventilation on all sides and that both the front and rear panels are unobstructed.
- Severe over current conditions: This occurs whenever the signal being output from the SZ Series rises to a level above 20% THD (Total Harmonic Distortion).
- Shorted speaker cables: This will occur if, due to faulty wiring, the hot and ground signals being output by the SZ Series are shorted to one another.
- Output impedance drops below 2 ohms: This can occur if the SZ Series is connected to inappropriate speaker systems (see the "Setting Up and Using Your SZ Series" section on page 10 in this manual for more information).
In general, any time the Protection LED lights up (other than during the approximately five seconds following initial power-up), there is reason to be concerned. If this occurs, turn the SZ Series off immediately and carefully check all wiring and external devices in order to locate and correct the condition that caused the LED to light up in the first place.
For further assistance, contact your local Samson dealer. If purchased in the United States, you can call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST.
PROTECT
CLIP O
-20 dB
SIGNAL
SZ Series Connections
The following diagrams illustrate various wiring set ups for 4 ohm, 8 ohm and 70 Volt operation.
8 Ohm Operation (One 8 Ohm speaker per amplifier)
4 Ohm Operation (Two 8 Ohm speakers per amplifier)
flowchart
graph TD
A["S-zone"] --> B["DC 24V INPUT"]
B --> C["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
C --> D["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
D --> E["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
E --> F["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
F --> G["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
G --> H["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
H --> I["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
I --> J["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
J --> K["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
K --> L["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
L --> M["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
M --> N["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
N --> O["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
O --> P["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
P --> Q["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
Q --> R["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
R --> S["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
S --> T["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
T --> U["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
U --> V["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
V --> W["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
W --> X["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
X --> Y["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
Y --> Z["SMSON SZ1120 120 WATT POWER AMPLIFIER"]
70 Volt Operation (Four speakers per amplifier with their line transformers set to 25 watt)
SZ Series System Set Up
The following is a typical constant voltage system setup for a small restaurant using four SZ1120 power amplifiers along with an S zone feeding several audio zones with paging and music. The first two SZ amps are connected to four wall-mounted speakers in each of the Dining Rooms with their transformers set to a 25 watt tap. The third SZ amp powers two speakers in the outside Bar area with their transformers set to 50 watt. (The db300i's are specially treated so they're suitable for indoor and outdoor use.) The fourth SZ amp powers small speakers in the lobby with a 12 watt tap.
flowchart
graph TD
subgraph Dining Room 1
A["25 watt tap"] --> B["25 watt tap"]
B --> C["25 watt tap"]
C --> D["25 watt tap"]
end
subgraph Dining Room 2
E["25 watt tap"] --> F["25 watt tap"]
F --> G["25 watt tap"]
G --> H["25 watt tap"]
end
I["SAMSON SZ1120"] --> J["SALES"]
K["SAMSON SZ1120"] --> L["SALES"]
M["SAMSON SZ1120"] --> N["SALES"]
O["SAMSON SZ1120"] --> P["SALES"]
Q["SAMSON SZ1120"] --> R["SALES"]
S["SAMSON SZ1120"] --> T["SALES"]
U["SAMSON SZ1120"] --> V["SALES"]
W["SAMSON SZ1120"] --> X["SALES"]
Y["SAMSON SZ1120"] --> Z["SALES"]
AA["SAMSON SZ1120"] --> AB["SALES"]
AC["SAMSON SZ1120"] --> AD["SALES"]
AE["SAMSON SZ1120"] --> AF["SALES"]
AG["SAMSON SZ1120"] --> AH["SALES"]
AI["SAMSON SZ1120"] --> AJ["SALES"]
AK["SAMSON SZ1120"] --> AL["SALES"]
AM["SAMSON SZ1120"] --> AN["SALES"]
AO["SAMSON SZ1120"] --> AP["SALES"]
AQ["SAMSON SZ1120"] --> AR["SALES"]
AS["SAMSON SZ1120"] --> AT["SALES"]
AU["SAMSON SZ1120"] --> AV["SALES"]
AW["SAMSON SZ1120"] --> AX["SALES"]
AY["SAMSON SZ1120"] --> AZ["SALES"]
BA["SAMSON SZ1120"] --> BB["SALES"]
BC["SAMSON SZ1120"] --> BD["SALES"]
BE["SAMSON SZ1120"] --> BF["SALES"]
BG["SAMSON SZ1120"] --> BH["SALES"]
BI["SAMSON SZ1120"] --> BJ["SALES"]
BK["SAMSON SZ1120"] --> BL["SALES"]
BM["SAMSON SZ1120"] --> BN["SALES"]
BO["SAMSON SZ1120"] --> BP["SALES"]
BQ["SAMSON SZ1120"] --> BR["SALES"]
BS["SAMSON SZ1120"] --> BT["SALES"]
BU["SAMSON SZ1120"] --> BV["SALES"]
BW["SAMSON SZ1120"] --> BX["SALES"]
BY["SAMSON SZ1120"] --> BZ["SALES"]
CA["SAMSON SZ1120"] --> CB["SALES"]
CC["SAMSON SZ1120"] --> CD["SALES"]
CE["SAMSON SZ1120"] --> CEB["SALES"]
CF["SAMSON SZ1120"] --> CG["SALES"]
DH["SAMSON SZ1120"] --> DI["SALES"]
DJ["SAMSON SZ1120"] --> DJB["SALES"]
DK["SAMSON SZ1120"] --> DL["SALES"]
DV["SAMSON SZ1120"] --> DVB["SALES"]
DW["SAMSON SZ1120"] --> DWB["SALES"]
BX["SAMSON SZ1120"] --> BXB["SALES"]
BY["SAMSON SZ1120"] --> BYB["SALES"]
BZ["SAMSON SZ1120"] --> BZB["SALES"]
DC["SAMSON SZ1120"] --> DCB["SALES"]
DB["SAMSON SZ1120"] --> DBB["SALES"]
BE["SAMSON SZ1120"] --> BEB["SALES"]
BF["SAMSON SZ1120"] --> BFB["SALES"]
BG["SAMSON SZ1120"] --> BGB["SALES"]
BH["SAMSON SZ1120"] --> BHB["SALES"]
BI["SAMSON SZ1120"] --> BIB["SALES"]
BJ["SAMSON SZ1120"] --> BJB["SALES"]
BK["SAMSON SZ1120"] --> BKB["SALES"]
BL["SAMSON SZ1120"] --> BLB["SALES"]
BN["SAMSON SZ1120"] --> BNB["SALES"]
BO["SAMSON SZ1120"] --> BOB["SALES"]
BX["SAMSON SZ1120"] --> BXB["SALES"]
BY["SAMSON SZ1120"] --> BYB["SALES"]
BZ["SAMSON SZ1120"] --> BZB["SALES"]
BC["SAMSON SZ1120"] --> BCB["SALES"]
BD["SAMSON SZ1120"] --> BDB["SALES"]
BE["SAMSON SZ1120"] --> BEB["SALES"]
BF["SAMSON SZ1120"] --> BFB["SALES"]
SZ Series Input Wiring Guide
SZ Series Input Wiring Guide
There are several ways to interface the SZ Series amplifiers, depending on your exact system set-up. Follow the cable diagrams below for connecting to the input of your amplifier.
Male XLR to Female XLR (balanced)
Male XLR to 1/4-inch (Balanced)
Male XLR to1/4-inch (Unbalanced)
Male XLR to RCA (Unbalanced)
SZ Series Output Wiring Guide
SZ Series Output Wiring Guide
There are several ways to interface the SZ Series amplifiers, depending on your exact system set-up. Follow the cable diagrams below for connecting to the output of your amplifier.
Follow the guidelines below to select the appropriate size wire based on the distance from the amplifier to the speaker. The wire sizes apply to the 4-ohm tap.
Distance Wire Size
Up to 25 ft. 16 AWG
26\~40 ft. 14 AWG
41\~60 ft. 12AWG
61\~100 ft. 10AWG
101ft\~150 ft. 8AWG
151\~200 ft. 6AWG
NOTE: Custom wiring should only be performed by licensed and insured, qualified personnel. Class 2 wiring is required.
CAUTION: Never use shielded cable for output power wiring
SHOCK HAZARD SYMBOL
WARNING!!! - PAY ATTENTION TO THE WARNING SYMBOL AND AVOID ELECTRICAL SHOCK. DO NOT HOLD OR TOUCH THE COMMON AND 70 OR 100 VOLT WIRE CONNECTION WHILE OPERATING THE AMPLIFIER.
Specifications
Specifications
Rated Output (at T.H.D 1.0%, 1kHz)
SZ1120 120Watt
SZ1240 240Watt
SZ1360 360Watt
Gain Control -12dB \~ 0dB
Input Sensitivity (at Balanced line) 1.0 ± 0.1Vrms / 10Kohm
High-pass Filter(at 400Hz) -3dB
Frequency Response +1.5 / -3 dB at 70Hz\~18kHz
S/N Ratio Better than 90dB
T.H.D at 1/2 rated output, 1kHz Less than 1.0%
Operating Temperature/Humidity 0°\~40°C at 95% non-condensing
Power Consumptions at full power
SZ1120 185W
SZ1240 361W
SZ1360 525W
Power Requirement AC100V\~240V, 50/60Hz and/or DC24V
DC Power battery back-up power specification:
| SZ1120 | SZ1240 | SZ1360 | ||
| DC 24 V | 1/8 POWER | 3.1 A | 5.8 A | 7.5 A |
| 1/3 POWER | 4.8 A | 9.2 A | 12.1 A | |
| FULL POWER (T.H.D+N 1%) | 8.2 A | 15.9 A | 20.9 A | |
| DC 24V | T.H.D+N at 120/240/360W | 3.40% | 3.80% | 12.50% |
| DC 24V | WATTS at T.H.D+N 1% | 111 W | 211 W | 248 W |
| DC 26.4 V | 1/8 POWER | 3.3 A | 6.4 A | 8.7 A |
| 1/3 POWER | 5.3 A | 10.3 A | 14 A | |
| FULL POWER (T.H.D+N 1%) | 9A | 17.9 A | 24.1 A | |
| DC 26.4V | T.H.D+N at 120/240/360W | 0.42% | 0.53% | 2.60% |
| DC 26.4V | WATTS at T.H.D+N 1% | 132 W | 264 W | 329 W |
Dimensions (Width/Height/Depth) 482 mm X 88 mm X 340 mm
Net Weight
SZ1120 25.6 lb. (11.65kg)
SZ1240 30.5 lb.(13.87kg)
SZ1360 33.4 lb.(15.16kg)
Block Diagram
BLOCK DIAGRAM
SZ1120 / SZ1240 / SZ1360
flowchart
graph TD
A["INPUT BALANCED 1V/10Kohms"] --> B["BA"]
C["LINK OUTPUT"] --> D["HPF"]
D --> E["HPF SW"]
E --> F["LEVEL ADJUSTMENT -12dB to 0dB"]
F --> G["VOLTAGE DRIVE"]
G --> H["+"]
H --> I["DUAL SPEED FAN DRIVER"]
I --> J["TEMPERATURE DETECTION & PROTECTION"]
J --> K["CURRENT DRIVE"]
K --> L["100V OUTPUT MATCHING"]
L --> M["70V"]
M --> N["25V"]
N --> O["COM"]
O --> P["40HM"]
P --> Q["COM"]
R["PROT"] --> S["LED DRIVER"]
T["CLIP"] --> U["-20dB"]
V["SIG"] --> W["+40V"]
X["POWER"] --> Y["+22V"]
Z["DC REGULATOR"] --> AA["AC VOLTAGE SELECT"]
AA --> AB["POWER SWITCH"]
AC["AC INPUT"] --> AD["AC INPUT"]
Samson Technologies Corp.
45 Gilpin Avenue
Hauppauge, New York 11788-8816
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: 631-784-2201
www.samsontech.com
- CAUTION
- RISK OF ELECTRIC SHOCK DO NOT OPEN
- IMPORTANT SAFETY INSTRUCTIONS
- Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad
- WARNING
- AVIS
- ATTENTION
- Introduction
- SZ Series Features
- SZ Series Layout - Front Panel
- SZ Series Layout - Rear Panel
- Designing an Installation Plan
- Selecting the Sound Sources
- Creating the Audio Zones
- Locating Your Equipment Rack
- Selecting Speakers for Each Zone
- Using Active Speakers
- Using Passive Speakers
- Using A Constant Voltage Speaker System
- Using A Constant Voltage Speaker System - continued
- Setting Up and Using Your SZ Series
- The SZ Series Protection Circuitry
- SZ Series Connections
- SZ Series System Set Up
- SZ Series Input Wiring Guide
- SZ Series Output Wiring Guide
- Distance Wire Size
- SHOCK HAZARD SYMBOL
- Specifications
- Block Diagram
Brand : SAMSON
Model : SZ1120
Category : Receiver