GTX4600 - Car stereo Crunch - Free user manual and instructions

USER MANUAL GTX4600 Crunch

SAFETY INSTRUCTIONS	18
INSTALLATION INSTRUCTIONS	19
2-CHANNEL AMPLIFIERS	21
Features and operational controls	21
Interconnection example 2-Channel-Mode: 1 x Stereo System (Front or Rear)	22
Interconnection example 1-Channel-Mode: 1 x Mono Subwoofer bridged	23
4-CHANNEL AMPLIFIERS	24
Features and operational controls	24
Interconnection example 4-Channel-Mode: 1 x Stereo System (Front) and 1 x Stereo System (Rear)	25
Interconnection example 2-Channel-Mode: 2 x Mono Subwoofer bridged	26
Interconnection example 3-Channel-Mode: 1 x Stereo System and 1 x Mono Subwoofer bridged	27
FILTER SETTING RANGE	28
SPECIFICATIONS	29
TROUBLE SHOOTING	30

This symbol adverts you a important reference note on the following pages. Observe these reference notes by any means, otherwise damage of the device or the vehicle may be caused. Furthermore serious injuries may be caused by not following these reference notes.

REFERENCE NOTE!

VERY IMPORTANT ADVICE FOR THE INSTALLATION AND OPERATION IN NEWER VEHICLES!

In vehicles with a newer year of manufacturing (since approx. 2002), normally computer controlled diagnosis- and controlling systems are applied - like CAN-BUS or MOST-BUS interfaces. By the installation of a car audio amplifier a new appliance will be added to the 12V on-board electrical system, which may cause under several circumstances error messages or may interrupt this factory made diagnosis system, as a result of high stress peaks and a higher power consumption. Thus to this, depending on model and manufacturer, the driving safety or important security systems like airbags, ESC or others could be interrupted.

If you plan to operate the amplifier in a vehicle like described above, please follow these instructions:

• Admit the installation only by a skilled specialist, best by a service company, which is specialized on maintenance and repairing your vehicle and which is familiar with the electrical on-board system of the vehicle.
• After the installation, order by any means a computer based diagnosis of the on-board system by your service company to detect possible malfunctions or error messages.
• If the on-board system is interrupted by the installation of the amplifier, in-between installed power capacitors can stabilize the electrical on-board system and ensure a proper and stable operation.
• The best solution is the integration of an additional second 12 V electrical system for the complete sound system, which can be operated independently via a own battery supply.

CONSULT BY ANY MEANS YOUR CAR SPECIALIZED SERVICE COMPANY!

PLEASE KEEP THIS MANUAL FOR LATER PURPOSES!

PLEASE ATTEND THE FOLLOWING ADVICES BEFORE THE FIRST OPERATION!

THE PURCHASED DEVICE IS ONLY SUITABLE FOR AN OPERATION WITH A 12V ON-BOARD ELECTRICAL SYSTEM OF A VEHICLE. Otherwise fire hazard, risk of injury and electric shock consists.

PLEASE DO NOT MAKE ANY OPERATION OF THE SOUND-SYSTEM, WHICH DISTRACT YOU FROM A SAFE DRIVING. Do not make any procedures, which demand a longer attention. Perform these operations not until you have stopped the vehicle on a safe place. Otherwise the risk of accident consists.

ADJUST THE SOUND VOLUME TO AN APPROPRIATE LEVEL, THAT YOU ARE STILL ABLE TO HEAR EXTERIOR NOISES WHILE DRIVING. High performance sound systems in vehicles may generate the acoustic pressure of a live concert. The permanent listening to extrem loud music may cause the loss of your hearing abilities. The hearing of extreme loud music while driving may derogate your cognition of warning signals in the traffic. In the interests of the common safeness, we suggest to drive with a lower sound volume. Otherwise the risk of accident consists.

DO NOT COVER COOLING VENTS AND HEATSINKS. Otherwise this may cause heat accumulation in the device and fire hazard consists.

DO NOT OPEN THE DEVICE. Otherwise fire hazard, risk of injury and electric shock consists. Also this may cause a loss of the warranty.

REPLACE FUSES ONLY WITH FUSE WITH THE SAME RATING. Otherwise fire hazard and risk of electric shock consists.

DO NOT USE THE DEVICE ANY LONGER, IF A MALFUNCTION, WHICH REMAINS UNREMEDIED. Observe in this case the chapter TROUBLE SHOOTING. Otherwise risk of injury and the damage of the device consists. Commit the device to an authorized retailer.

THE INSTALLATION OF A POWER CAPACITOR WITH SUFFICIENT CAPACITY IS RECOMMENDED. High performance amplifiers cause high potential voltage drops and need a high power consumption at a high volume level. To relieve the vehicle's on-board system, it is recommended to install a power capacitor between the battery and the device which works as buffer. Consult your car audio retailer for the appropriate capacity.

INTERCONNECTION AND INSTALLATION SHOULD BE ACCOMPLISHED BY SKILLED STAFF ONLY. The interconnection and installation of this device demands technical aptitude and experience. For your own safness, commit the interconnexion and installation to your car audio retailer, where you have purchased the device.

DISCONNECT THE GROUND CONNECTION FROM THE VEHICLE'S BATTERY BEFORE INSTALLATION. Before you start with the installation of the sound system, disconnect by any means the ground supply wire from the battery, to avoid any risk of electric shock and short circuits.

CHOOSE A APPROPRIATE LOCATION FOR THE INSTALLATION OF THE DEVICE. Look for a appropriate location for the device, which ensures a sufficient air circulation. The best places are spare wheel cavities, and open spaces in the trunk area. Less suitable are storage spaces behind the side coverings or under the car seats.

DO NOT INSTALL THE DEVICE AT LOCATIONS, WHERE IT WILL BE EXPOSED TO HIGH HUMIDITY AND DUST. Install the device at a location, where it will be protected from high humidity and dust. If humidity and dust attain inside the device, malfunctions may be caused.

MOUNT THE DEVICE AND OTHER COMPONENTS OF THE SOUND SYSTEM SUFFICIENTLY. Otherwise the device and components may get loose and act as dangerous objects, which could cause serious harm and damages in the passenger room.

ENSURE NOT TO DAMAGE COMPONENTS, WIRES AND CABLES OF THE VEHICLE WHEN YOU DRILL THE MOUNTING HOLES. If you drill the mounting holes for the installation into the vehicle's chassis, ensure by any means, not to damage, block or tangent the fuel pipe, the gas tank, other wires or electrical cables.

ENSURE CORRECT CONNECTION OF ALL TERMINALS. Faulty connections may could cause fire hazard and lead to damages of the device.

DO NOT INSTALL AUDIO CABLES AND POWER SUPPLY WIRES TOGETHER. Observe while installation not to lead the audio cables between the headunit and the amplifier together with the power supply wires on the same side of the vehicle. The best is a areal separated installation in the left and right cable channel of the vehicle. Therewith a overlap of interferences on the audio signal will be avoided. This stands also for the equipped bass-remote wire, which should be installed not together with the power supply wires, but rather with the audio signal cables.

ENSURE THAT CABLES MAY NOT CAUGHT UP IN CLOSE-BY OBJECTS. Install all the wires and cables like described on the following pages, therewith these may not hinder the driver. Cables and wires which are installed close-by the steering wheel, gear lever or the brake pedal, may caught up and cause highly dangerous situations.

DO NOT SPLICE ELECTRICAL WIRES. The electrical wires should not be bared, to provide power supply to other devices. Otherwise the load capacity of the wire may get overloaded. Use therefor a appropriate distribution block. Otherwise fire hazard and risk of electric shock consists.

DO NOT USE BOLTS AND SCREW NUTS OF THE BRAKE SYSTEM AS GROUND POINT. Never use for the installation or the ground point bolts and screw-nuts of the brake system, steering system or other security-relevant components. Otherwise fire hazard consists or the driving safety will be derogated.

ENSURE NOT TO BEND OR SQUEEZE CABLES AND WIRES BY SHARP OBJECTS. Do not install cables and wires not close-by movable objects like the seat rail or may be bended or harmed by sharp and barbed edges. If you lead a wire or cable through the hole in a metal sheet, protect the insulation with a rubber grommet.

KEEP AWAY SMALL PARTS AND JACKS FROM CHILDREN. If objects like these will be swallowed, a risk of serious injuries consists. Consult promptly a medical doctor, if a child swallowed a small object.

REFERENCE NOTE

Before you start with the installation of the sound system, disconnect by any means the GROUND connection wire from the battery, to avoid any risk of electric shock and short circuits.

MECHANICAL INSTALLATION

Avoid any damage removing of the components of the vehicle like wires, cables, board computer, seat belts, gastank or the like.

Ensure that chosen location provide sufficient air circulation for the amplifier. Do not mount the device into small or sealed spaces without air circulation near by heat dispersing parts or electrical parts of the vehicle.

Do not mount the amplifier on top of a subwooferbox or any other vibrating parts, thereby parts in the inside of the amplifier may get loosen.

The wires and cables of power supply and the audio signal must be as short as possible, to avoid any losses and interferences.

1

4 x Mounting bracket Amplifier

Before mounting the brackets you should remove the castparts on each end. Then install the 4 supplied mounting brackets on the bottom side of the amplifier with the supplied screws. Ensure that the angled side of the brackets are pointed to the inner side. The pre-drilled screw holes are located on each corner of the amplifier.

2

4 x Pen or peening tool Mounting bracket Amplifier Vehicle

Uphold the amplifier with the mounted brackets to the chosen mounting location in the vehicle. Then mark the four drill holes with a appropriate pen or peening tool and lead through the designated holes of the mounting brackets. Observe that there remains enough space for the installation of the cables and ensure that they will not be bended and have sufficient pull relief.

3

4 x Drill Marking Vehicle

Put the amplifier aside and then drill the holes for the mounting screws at the before marked locations. Please ensure not to damage any components of the vehicle while drilling the holes. Alternatively (depends on the material of the surface) you can also use self-tapping screws.

4

4 x Mounting screws Mounting bracket Amplifier Vehicle

Then uphold the amplifier to the chosen position and fix the screws through the holes of the mounting brackets into the drilled screwholes. Ensure that the mounted amplifier is fixed tight and not get loosen.

ELECTRICAL INTERCONNECTION

CRUNCH GRAVITY OUTPUT 13 22 2 CE 4 1

BEFORE THE CONNECTION

For the professional installation of a sound system appropriate wiring kits are available in car audio retailer stores. Observe the sufficient profile section (at least 25 mm ^2 ), the suitable fuse rating and the conductivity of the cables when you purchase your wiring kit. Clean and remove rust-streaked and oxidized areas on the contact points of the battery and the ground connection. Make sure that all screws are fixed tight after the installation, because loosely connections may cause malfunctions, insufficient power supply or interferences. We recommend therefore the CRUNCH CR25WK wirekit.

1 LOGO BADGE

With this switch you can choose between white or blue illumination of the upper logo badge. Observe by any means the directives of your national road traffic regulations.

GND

2 Connect this GROUND terminal with a suitable contact ground point on the vehicle's chassis. The ground wire must be as short as possible and must be connected to a blank metallic point at the vehicle's chassis. Ensure that this ground point has a stable and safe electric connection to the negative “—”pole of the battery. Check this ground wire from the battery to the ground point if possible and enforce it, if required. Use a ground wire with a sufficient cross section (at least 25 mm ^2 ) and the same size like the plus (+12V) power supply wire.

2 REM

3 Connect the turn-on signal (e.g. automatic antenna) or the turn-on remote signal of your headunit with the REM-terminal of the amplifier. Use therefor a suitable cable with a sufficient cross section (0,5 mm²). Thereby the amplifier will turn on or off automatically with your headunit.

BATT+12V

4 Connect the BATT+12V-terminal with the +12V pole of the vehicle's battery. Use therefor a suitable cable with a sufficient cross section (min. 25 mm ^2 ) and install a additional in-line fuse. For safety reasons the distance between the fuseblock and the battery must be shorter than 30 cm. Do not install the fuse into the fuseblock until the installation is accomplished.

FUSE

5 The inserted fuses protect the amplifier from shorts and capacity overload. The equipped standard fuse is suitable for a 4 ohm speaker load. For a 2 ohm speaker load the current consumption increases by 50%, thereby the fuses may need to be replaced by fuses with a higher rating.

REFERENCE NOTE

Installation of RCA/Audio signal cables and power supply.

Observe while installation not to lead the audio cables between the headunit and the amplifier together with the power supply wires on the same side of the vehicle. The best is a areal separated installation in the left and right cable channel of the vehicle. Therewith a overlap of interferences on the audio signal will be avoided. This stands also for the equipped bass-remote wire, which should be installed not together with the power supply wires, but rather with the audio signal cables.

FUNCTIONS AND OPERATIONAL CONTROLS

CRUNCH GRAVITY REMOTE LP/BP + + 3 BPF 1 L2kHz 6 8 9 43 52

1 POWER/PROTECT (Also located on the Bass Remote unit)

If the POWER LED lights up, the amplifier is ready for operation.

If the PROTECT LED lights up, a malfunction is indicated. Observe in this case the chapter TROUBLE SHOOTING.

2 The REMOTE port is for the cable of the enclosed bass remote controller and only to use in the LP/BP mode. With this bass remote controller, you are able to adjust the level e.g. out of the driver's seat. Please use only the enclosed bass remote controller and cable.

The CH1/2 X-OVER switch selects the required operation mode of the amplifier.

Position LP/BP: Lowpass mode (the higher frequencies will be eliminated. Adjustable by the lowpass controller.) The HIGH PASS controller works in this operation mode as subsonicfilter and eliminates the lower frequencies (Bandpass-Mode). NOTE: If this controller is turned to a higher value than the lowpass controller, no sound is hearable.

Position HP: Highpass mode (the higher frequencies will be eliminate. Adjustable by the highpass controller.)

Position FULL: Fullrange mode (the whole frequencies will be amplified).

4 The LEVEL INPUT controller adjusts the input sensitivity of the amplifier to align the audio signal from the head unit. The input sensitivity is adjustable from 4 to 0.2 Volts.

5 The BASS BOOST controller adjusts the bass boost enhancement continuously from 0dB to +12dB at 45 Hz.

6 The LOW PASS controller adjusts the cut-off point of the frequency range to above. The cut-off frequency is continuously adjustable from 30 Hz to 150 Hz.

7 The HIGH PASS controller adjusts the cut-off point of the frequency range to below. The cut-off frequency is continuously adjustable from 10 Hz to 1200 Hz (1.2 kHz).

The LINE INPUT RCA jacks must be connected with the RCA output jacks of the headunit.

The LINE OUT RCA jacks provide a linear fullrange audiosignal to supply an additional amplifier.

INTERCONNECTION EXAMPLE 2-Channel Mode: 1x Stereo System (Front or rear)

CRUNCH GRAVITY Loudspeaker left 2 - 8 Ohms

Loudspeaker right 2 – 8 Ohms

CRUNCH BANV74 Switch position HP or FULL Connect stereo RCA output (L/R) of the headunit with LINE INPUT L/R of the amplifier R right

INTERCONNECTION

• Connect the RCA lineouts of the headunit with the RCA jacks LINE INPUT of the amplifier with appropriate high-value RCA cables.
• Connect the front- or rear speakers with the speaker outputs (SPEAKER OUTPUT + 1CH - and + 2CH -) by using appropriate wires.
• Ensure by any means, that the total impedance load of all speakers is not lower than 2 ohms. Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

CROSSOVER SETTINGS

• By using bigger speakers (more than 20cm) you can set the X-OVER switch to the FULL position (Full Range Signal).
• By using smaller speakers (8.7cm - 16cm) you must set the X-OVER switch to the HP Position (Highpass Mode) to avoid any damage by lower frequencies on the speakers. The cut-off frequency is adjustable with the HIGH PASS controller and should be set between 60Hz to 150Hz, depending on the size of the speakers.
• The LOW PASS Controller is not in use in this interconnecting example.

• Turn the LEVEL INPUT controller of the amplifier to the 4V position.
• Turn the volume controller of the headunit to 80 - 90% of its full setting.
• Turn the LEVEL INPUT controller clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.

BASS BOOST CONTROLLER

- The BASS BOOST controller must be turned to 0 dB position in this interconnecting example.

BASS REMOTE

- The enclosed BASS REMOTE Controller is not in use in this interconnecting example.

REFERENCE NOTE

Do not connect loudspeaker cables with the vehicle chassis. Always ensure the correct polarity of all connections. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

INTERCONNECTION EXAMPLE 1-Channel Mode: 1x Mono Subwoofer bridged

CRUNCH GRAVITY Subwoofer 4 - 8 Ohms Connect the bass remote controller and the remote terminal on the amplifier with the enclosed cable. CAUNCH GRAVITY Switch position LP/BP Connect stereo RCA output (L/R or SUB OUT) of the headunit with LINE INPUT L/R of the amplifier R

INTERCONNECTION

• Connect the RCA lineouts of the headunit with the RCA jacks LINE INPUT of the amplifier with appropriate high-value RCA cables. If your headunit is equipped with a additional subwoofer lineout (SUB OUT), it is recommended to use this lineout.
• Connect the subwoofer with the speaker outputs (SPEAKER OUTPUT + BRIDGED -) by using appropriate wires.
• Ensure by any means, that the total impedance load of the channel-pair is not lower than 4 ohms. Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

CROSSOVER SETTINGS

• In the mono/subwoofer mode the X-OVER switch must set to the LP/BP position (Lowpass/Bandpass mode), thereby the higher frequencies will be eliminated. The cut-off frequency is adjustable with the LOW PASS controller and should be set between 60 to 100Hz , depending on the size of the subwoofer.
• In the lowpass mode (LP/BP) the HIGH PASS controller works also as subsonicfilter, that eliminates the ultra-low, not hearable and harmful frequencies to generate a bandpass signal (Bandpass mode). The subsonic frequency should be set between 15 to 40Hz , depending on the size of the subwoofer. NOTE: If this value is higher than the lowpass setting, no sound is hearable.

LEVEL CONTROLLER

• Turn the LEVEL INPUT controller of the amplifier to the 4V position.
• Turn the volume controller of the headunit to 80 - 90% of its full setting.
• Turn the LEVEL INPUT controller clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.

BASS BOOST CONTROLLER

• The BASS BOOST controller adjusts the bass enhancement between 0db and +12dB.
• A too high bass boost may cause clipping/distortion and damage on the loudspeakers and also may harm your hearing abilities. Use this controller carefully!

BASS REMOTE

- The enclosed BASS REMOTE Controller adjusts the bass-level e.g. from the driver's seat. Please use only this enclosed bass remote controller and cable.

REFERENCE NOTE

Do not connect loudspeaker cables with the vehicle chassis. Always ensure the correct polarity of all connections.

Use the bass enhancement with care. A high bass boost may cause damage to your speakers and hearing abilities.

FUNCTIONS AND OPERATIONAL CONTROLS

CRUNCH GRAVITY L REMOTE UP/BP 4V 3 BPF I INPUT MODE CH3 CH4 4CH 2CH CH3 CH1 TWIN SDB OFF ON CH2 CH4 CH2 1 2 5 7 9 1 3 1

1 The LINE OUT RCA jacks provide a linear fullrange audiosignal to supply an additional amplifier.

POWER/PROTECT

If the POWER LED lights up, the amplifier is ready for operation.

If the PROTECT LED lights up, a malfunction is indicated. Attend in this case the chapter TROUBLE SHOOTING.

3 The REMOTE port is for the cable of the enclosed bass remote controller and only to use in the LP/BP mode. With this bass remote controller, you are able to adjust the level e.g. from the driver's seat. Please use only the enclosed bass remote controller and cable.

4 The CH1/2 and CH3/4 X-OVER switch selects the required operation mode of the amplifier on the regarding channel pair (Channel 1/2 or Channel 3/4).

Position LP/BP: Lowpass mode (The higher frequencies will be eliminated. Adjustable by the lowpass controller.)

The HIGH PASS controller works in this operation mode as subsonicfilter and eliminates the lower frequencies (Bandpass-Mode). NOTE: If this controller is turned to a higher value than the lowpass controller, no sound is hearable.

Position HP: Highpass mode (The higher frequencies will be eliminated. Adjustable by the highpass controller.)

Position FULL: Fullrange mode (The whole frequencies will be amplified).

5 The LEVEL INPUT CH1/2 and CH3/4 controllers adjust the input sensitivity of the amplifier to align the audio signal of the head unit for the regarding channel pair (Channel 1/2 or Channel 3/4). The input sensitivity is adjustable from 4 to 0.2 Volts.

6 The BASS BOOST CH1/2 and CH3/4 controllers adjust the bass boost enhancement continuously from 0dB to +12dB at 45 Hz for the regarding channel pair (Channel 1/2 or Channel 3/4).

7 The LOW PASS CH1/2 and CH3/4 controllers adjust the cut-off point of the frequency range to above for the regarding channel pair (Channel 1/2 or Channel 3/4). The cut-off frequency is continuously adjustable from 30 Hz to 150 Hz.

8 The HIGH PASS CH1/2 and CH3/4 controllers adjust the cut-off point of the frequency range to below for the regarding channel pair (Channel 1/2 or Channel 3/4). The cut-off frequency is continuously adjustable from 10 Hz to 1200 Hz (1.2 kHz).

9 The TWIN SUB switch in position ON effectuates, that the bass remote controller adjusts the level simultaneously on both channel pairs (CH1/2 & CH3/4) in the mono-bridge mode with two subwoofers. In switch position OFF, the bass remote works only on CH3/4. Also all crossover settings (BASS BOOST, LP/BP, HP, LEVEL) of CH1/2 will be synchronized with CH3/4.

10 The INPUT MODE switch must be in 2CH position, if you connect only one RCA stereo audio cable with the CH1/2 line inputs. Select the position 4CH, if you connect two RCA stereo audio cables with CH1/2 and CH3/4 line inputs. The fader function of your headunit works only in the 4CH mode.

If you have select the 2CH mode, the input signal of LINE INPUT CH1/2 will be routed to the channelpair CH3/4. Due to this, only one RCA stereo audio cable is required. Therefore the additional available subwoofer lineout (SUB OUT) of your headunit is recommended in the TWIN SUB mode and no Y-Adaptors are required.

11 The LINE INPUT RCA jacks must be connected with the RCA output jacks of the headunit. By connecting only the CH1/2 jacks, the INPUT MODE switch must be set to the 2CH position.

INTERCONNECTION EXAMPLE 4-Channel Mode: 2 x Stereo System (Front & rear)

INTERCONNECTION

• Connect the RCA lineouts of the headunit with the RCA jacks LINE INPUT of the amplifier with appropriate high-value RCA cables.
• Connect the front- and rear speakers with the speaker outputs (SPEAKER OUTPUT + 1CH -, + 2CH - and + 3CH -, + 4CH -).
• Ensure by any means, that the total impedance load of all speakers is not lower than 2 ohms. Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

INPUT MODE SWITCH

- Select the 4CH position on the INPUT MODE switch. If there is only one RCA stereo audio cable from the headunit available, connect the CH1/2 RCA line inputs and select the 2CH position.

CROSSOVER SETTINGS CH1/2 & CH3/4

• By using bigger speakers (more than 20cm) you can set the X-OVER switch to the FULL position (Full Range Signal).
• By using smaller speakers (8.7cm - 16cm) you must set the X-OVER switch to the HP Position (Highpass Mode) to avoid any damage by lower frequencies on the speakers. The cut-off frequency is adjustable with the HIGH PASS controller and should be set between 60Hz to 150Hz, depending on the size of the speakers.
• The LOW PASS Controller is not in use in this interconnecting example.

• Turn the LEVEL INPUT controller of the amplifier to the 4V position.
• Turn the volume controller of the headunit to 80 - 90% of its full setting.
• Turn the LEVEL INPUT controller clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.

BASS BOOST CONTROLLER

- The BASS BOOST controller must be turned to 0 dB position in this interconnecting example.

BASS REMOTE

- The enclosed BASS REMOTE Controller is not in use in this interconnecting example.

TWIN SUB SWITCH

- Select position OFF on the TWIN SUB switch.

REFERENCE NOTE

Do not connect loudspeaker cables with the vehicle's chassis. Always ensure the correct polarity of all connections. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

INTERCONNECTION EXAMPLE 2-Channel Mode: 2 x Mono Subwoofer bridged

Subwoofer 1 4 - 8 Ohms CRUNCH GRAVITY Subwoofer 2 4 - 8 Ohms Connect Stereo RCA output (L/R or SUB OUT) of the headunit with the LINE INPUT L/R of the amplifier Switch position CH3/4 = LP/BP INPUT MODE = 2 CH TWIN SUB = ON R L

INTERCONNECTION

• Connect the RCA lineouts of the headunit with the RCA jacks LINE INPUT CH 1 and CH 2 of the amplifier with appropriate high-value RCA cables. If a separate SUB OUT from your headunit is available, use this as LINE OUT.
• Connect the subwoofers with the SPEAKER OUTPUTS CH1/2 + BRIDGED - and CH3/4 + BRIDGED -.
• Ensure by any means, that the total impedance load of all subwoofers per channelpair is not lower than 4 ohms. Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could damage the speakers.

INPUT MODE SWITCH

- Select the 2CH position on the INPUT MODE switch.

CROSSOVER SETTINGS & BASS BOOST CONTROLLER

- The X-OVER switch must be in position LP/BP and the TWIN SUB switch in position ON. All filter controllers (BASS BOOST, HIGH PASS, LOW PASS, LEVEL) of CH 1/2 are without function in TWIN SUB mode.

LEVEL INPUT CONTROLLER CH3/4 (SUBWOOFER 1+2)

• Observe the regarding notes on page 23.
• All LEVEL INPUT CONTROLLERS of CH1/2 are without function.

TWIN SUB & BASS REMOTE CH1/2 (SUBWOOFER 1) & CH3/4 (SUBWOOFER 2)

• The enclosed BASS REMOTE controller adjusts the bass-level e.g. from the driver's seat. That this BASS REMOTE controller is effective on both channel pairs (CH1/2 & CH3/4) you MUST set TWIN SUB switch in position ON. Please use only the enclosed bass remote controller and cable.
• Is the TWIN SUB switch on position ON, the controllers BASS BOOST, HIGH PASS, LOW PASS, LEVEL on CH1/2 are without function. All settings will be synchronized with CH3/4. In switch position OFF, the bass remote works only on CH3/4.

REFERENCE NOTE

Do not connect loudspeaker cables with the vehicle's chassis. Always ensure the correct polarity of all connections.

Use the bass enhancement with care. A high bass boost may cause damage to your speakers and hearing abilities.

EXAMPLE 3-Channel Mode: 1 x Stereo System & 1 x Mono Subwoofer bridged

Subwoofer 4 - 8 Ohms CRAUNCH GRAVITM Speaker left 2 - 8 Ohms Speaker right 2 - 8 Ohms C remo W

Connect the stereo RCA output (FL/FR and RL/RR) of the headunit with LINE INPUTS CH1/2 and CH3/4 of the amplifier

Switch position CH1/2 = HP or FULL and CH3/4 = LP/BP CRUNCH 0 TWIN SUB = OFF RL RR FR FL Connect the bass remote controller and the remote terminal on the amplifier with the enclosed cable.

INTERCONNECTION

• Connect the RCA lineouts of the headunit with the RCA jacks LINE INPUT of the amplifier with appropriate high-value RCA cables. If a separate SUB OUT from your headunit is available, use this for the LINE INPUT CH3/4 on the amplifier.
• Connect the speakers with SPEAKER OUTPUT + CH 1 - and + CH 2 - and the subwoofer with the SPEAKER OUTPUT CH3/4 + BRIDGED - of the amplifier.
• Ensure by any means, that the total impedance load of all speakers per channelpair (CH1 & CH2) is not lower than 2 ohms and the total impedance load of the subwoofer (CH3 & CH4) is not lower than 4 ohms. Too low impedance cause high temperature and will shut down the amplifier operation.

INPUT MODE SWITCH

- Observe the regarding notes on page 25.

- Observe the regarding notes on page 22.

- Observe the regarding notes on page 22.

BASS BOOST CONTROLLER CH1/2 (STEREO SYSTEM)

- The BASS BOOST controller must be turned to 0 dB position in this interconnecting example.

CROSSOVER SETTINGS CH3/4 (SUBWOOFER)

- Observe the regarding notes on page 23.

LEVER CONTROLLER CH3/4 (SUBWOOFER)

- Observe the regarding notes on page 23.

BASS BOOST CONTROLLER CH3/4 (SUBWOOFER)

• The BASS BOOST controller adjusts the bass enhancement between 0db and +12dB.
• A too high bass boost may cause clipping/distortion and damage on the loudspeakers and also may harm your hearing abilities. Use this controller carefully!

BASS REMOTE CH3/4 (SUBWOOFER)

- The enclosed BASS REMOTE Controller adjusts the bass-level e.g. from the driver's seat of the Subwoofer on CH 3/4. Please use only this enclosed bass remote controller and cable.

TWIN SUB SWITCH

- Select position OFF on the TWIN SUB switch.

LEVEL

4 V 3 V 2 V 0,5 V 0,2 V

HIGH PASS

10 Hz 20 Hz 90 Hz 500 Hz 1,2 kHz

LOW PASS

30 Hz 36 Hz 98 Hz 140 Hz 150 Hz

BASS BOOST

0 dB 1 dB 6 dB 9 dB 12 dB

MODELS	GTX2400	GTX2600	GTX4600	GTX4800
CHANNELS	2	2	4	4
CIRCUIT	CLASS A/BAnalog	CLASS A/BAnalog	CLASS A/BAnalog	CLASS A/BAnalog
OUTPUTPOWER RMS 13,8 V
Watts on 4 Ohms	2 x 110	2 x 160	4 x 80	4 x 110
Watts on 2 Ohms	2 x 200	2 x 300	4 x 150	4 x 200
Watts on 4 Ohm mono bridged	1 x 400	1 x 600	2 x 300	2 x 400
OUTPUTPOWER MAX. 13,8 V
Watts on 4 Ohms	2 x 220	2 x 320	4 x 160	4 x 220
Watts on 2 Ohms	2 x 400	2 x 600	4 x 300	4 x 400
Watts on 4 Ohm mono bridged	1 x 800	1 x 1200	2 x 600	2 x 800
Frequency Range -3dB	20Hz - 30 kHz	20Hz - 30 kHz	20Hz - 30 kHz	20Hz - 30 kHz
Damping Factor	>200	>200	>200	>200
Signal-to-Noise Ratio	>90 dB	>90 dB	>90 dB	>90 dB
Channel Separation	>74 dB	>74 dB	>74 dB	>74 dB
THD&N	<0,1%	<0,1%	<0,1%	<0,1%
Input Sensitivity	4 - 0.2 V	4 - 0.2 V	4 - 0.2 V	4 - 0.2 V
Input Impedance	>47 kOhm	>47 kOhm	>47 kOhm	>47 kOhm
CH 1 & CH 2
X-Over Modes	LP/BP - HP - Full	LP/BP - HP - Full	LP/BP - HP - Full	LP/BP - HP - Full
Various Highpassfilter	10 - 1200 Hz	10 - 1200 Hz	10 - 1200 Hz	10 - 1200 Hz
Various Lowpassfilter	30 - 150 Hz	30 - 150 Hz	30 - 150 Hz	30 - 150 Hz
Bass Boost @ 45 Hz	0 - 12 dB	0 - 12 dB	0 - 12 dB	0 - 12 dB
CH 3 & CH 4
X-Over Modes	-	-	LP/BP - HP - Full	LP/BP - HP - Full
Various Highpassfilter	-	-	10 - 1200 Hz	10 - 1200 Hz
Various Lowpassfilter	-	-	30 - 150 Hz	30 - 150 Hz
Bass Boost @ 45 Hz	-	-	0 - 12 dB	0 - 12 dB
Twin Sub Function	-	-	•	•
Bass Remote	•	•	•	•
Fullrange Outputs (Cinch/RCA)	•	•	•	•
Fuse Ratings	2 x 25 A	4 x 20 A	2 x 30 A	1 x 100 A
Dimensions
Width & Height	250 x 55 mm	250 x 55 mm	250 x 55 mm	250 x 55 mm
Length (Length total)	250 (300)	320 (370)	320 (370)	400 (430)

Technical specifications are subject to change! Errors are reserved!

For damages on the vehicle and the device, caused by handling errors of the device, we can't assume liability.

All CRUNCH Amplifiers are tagged with a individual serialnumber, which will be registered for statistic and service conditional purposes.

All CRUNCH Amplifiers are tagged with a E-Certification Number and also a CE-Certification Mark. Thereby these devices are certified for a use inside vehicles inside the European Union (EU).

The warranty conditions comply to the common consumer acts of the European Union (EU).

Malfunction: no function

Reason: Remedy:

1. The power supply connection of the device is not correct. Recheck
2. The cables have no mechanical or electrical contact. Recheck
3. The remote turn-on connection from the headunit to the amplifier is not correct. Recheck
4. Defective Fuses. In case of replacing the fuses, Observe by any means the correct fuse rating. Replace Fuses

Malfunction: no signal on loudspeakers, but power LED lights up

Reason: Remedy:

1. The connection of the speakers or the RCA audio cables is not correct.. Recheck
2. The speaker cables or the RCA audio cables are defective. Replace cables
3. The loudspeakers are defective. Replace speakers
4. High pass controller (Subsonic Mode) in LP/BP operation is adjusted to high. Turn down controller
5. No signal from headunit. Check headunit settings

Malfunction: one or more channels/controllers are without function / faulty stereo stage

Reason: Remedy:

1. The balance or fader controller of the headunit is not in the zero-position. Turn to zero-position
2. The connection of the speakers is not correct. Recheck
3. The loudspeakers are defective. Replace speakers
4. High pass controller in LP/BP operation is adjusted to high. Turn down controller
5. Twin Sub function is activated. Only the controllers of CH3/4 are working. Bring Twin Sub switch to OFF position

Malfunction: distortions on the loudspeaker's signal

Reason: Remedy:

1. The loudspeakers are overloaded. Turn down the level

Turn down the level on the headunit Switch off loudness on the headunit Reset bass EQ on the headunit

Malfunction: No bass or stereo sound

Reason: Remedy:

1. Interchange of loudspeaker cable polarity positive (+) and negative (-).
2. The RCA audio cables are loose or defective.

Reconnect

Reconnect or replacing the cables

Malfunction: amplifier runs into protection mode (red protection LED lights up)

Reason: Remedy:

1. Short circuit on the loudspeakers or cables.
2. Overheated by too low speaker impedance.
3. Insufficient air circulation by a inappropriate mounting position of the amplifier.
4. Overloaded by insufficient power supply (too thin profile section on the power cables).

Reconnect

Choose a higher impedance Use a new speaker setup

Change the mounting position Ensure air circulation

Use a bigger profile section

Malfunction: hiss or white noise on the loudspeaker's signal

Reason: Remedy:

1. The level controllers are turned up. Turn down the level
2. The treble controller on the headunit is turned up.
3. The speaker cables or the RCA audio cables are defective. Replacing the cables
4. The hissing is caused by the headunit.

Turn down the level on the headunit

Check the headunit

REFERENCE NOTE

PROTECTION CIRCUIT

This amplifier owns a 3-way protection circuit. If overloading, overheating and shorted loudspeakers, or too low impedance or insufficient power supply is insisted, the amplifier shuts down to prevent serious damage. If one of this disfunctions is detected, the red PROTECT LED lights up.

Check in this case all connections to detect short-circuits, faulty connections or overheating. Observe the regarding notes on the previous page.

If the reason for the disfunction is eliminated, the amplifier is ready for operation again.

If the red PROTECT LED does not stop to light up, a damage on the amplifier is insisted. In this case return the amplifier to your car audio retailer with a detailed malfunction description and a copy of the proof of purchase.

WARNING: Never open the amplifier and try to repair it by yourself. This causes a loss of warranty. The repairing service should be made only by skilled technicians.

REFERENCE NOTE

ELECTRICAL INTERFERENCES

The reason for interferences are mostly the passed cables and wires. Especially the power and audio cables (RCA) of your sound system are vulnerable. Often these interferences are caused by electric generators or other electrical units (fuel pump, AC etc.) of the car. The most of these problems can be prevented by a correct and careful wiring.

Here are some courtesy notes:

1. Use only double or triple shielded audio RCA cables for the connection between the amplifier and headunit. A useful alternative are represented by anti-noise-devices or additional ancillary equipment like Balanced Line Transmitters, which you can purchase at your car audio retailer. If possible do not use anti-noise-filters, which are splicing the ground of the RCA audio cables.
2. Do not lead the audio cables between the headunit and the amplifier together with the power supply wires on the same side of the vehicle. The best is a areal separated installation in the left and right cable channel of the vehicle. Therewith a overlap of interferences on the audio signal will be avoided. This stands also for the equipped bass-remote wire, which should be installed not together with the power supply wires, but rather with the audio signal cables.
3. Avoid ground loops by connecting all ground connections in a starlike arrangement. The suitable ground center point is ascertainable by measuring of the voltage directly on the vehicle's battery by a multi-meter. You should measure the voltage with turned-on inginition (acc.) and with other turned-on power consumers (e.g. headlights, rear window defroster, etc). Compare the measured value with the voltage of the ground point you have chosen for the installation and the positive pole (+12V) of the amplifier. If the voltage has just a little difference, you have found a suitable ground point. Otherwise you need to choose another ground point.
4. Use if possible only cables with added or soldered cable sockets or the like. Gold plated or high value nickel plated cable sockets are corrosionfree and own a very low contact resistance.

CRUNCH

GRAVITY SERIES