GTI2200 - Car stereo Crunch - Free user manual and instructions

Product Type	2-Channel Amplifier
Brand	Crunch
Model	GTI2200
RMS Output Power	2 x 110 W @ 4 Ohm, 2 x 200 W @ 2 Ohm, 1 x 400 W @ 4 Ohm bridged
Max Output Power	2 x 220 W @ 4 Ohm, 2 x 400 W @ 2 Ohm, 1 x 800 W @ 4 Ohm bridged
Speaker Impedance (Stereo)	2 - 8 Ohm
Frequency Response	5 - 40,000 Hz (-3 dB)
Total Harmonic Distortion	< 0.05% (1 kHz)
Signal-to-Noise Ratio	> 90 dB
Input Sensitivity	0.2 V - 4 V
Input Impedance	20 kOhm
Low-Pass Filter	40 - 150 Hz @ 12 dB/Octave
High-Pass Filter	60 - 1200 Hz @ 12 dB/Octave
Bass Boost	0 - 12 dB (at 45 Hz)
Power Supply	+12 V (9 - 15 V), negative ground
Fuse	2 x 20 A
Dimensions (W x H x D)	251 x 55 x 250 mm (without connectors) / 280 mm (with connectors)
Inputs	Stereo RCA + High Level Input
Outputs	RCA for additional amplifier
Protection	Power LED (green) and Protection LED (red): overheating and short circuit
Safety	Installation by a specialist recommended; disconnect battery before installation; observe minimum impedances

Frequently Asked Questions - GTI2200 Crunch

Why doesn't the POWER light turn on?

First check the inline fuse on the positive battery cable, then the amplifier fuses (2 x 20 A). Make sure the ground connection is clean and the supply voltage is between 9 and 15 volts at the +12V and REMOTE terminals.

What should I do if the PROTECTION light comes on?

This indicates a short circuit or too low impedance on the speaker outputs, or overheating. Check the speaker connections with an ohmmeter, ensure the impedance is at least 2 Ohms in stereo or 4 Ohms in bridged mode, and let the amplifier cool down if necessary.

How do I adjust the input sensitivity?

Set your car radio volume to about 75% of its range, then adjust the input level control (Fig. 1,5) until you get a moderate volume without distortion. This optimizes the signal-to-noise ratio.

How do I connect a subwoofer in bridged mode?

Use the RCA cable from the subwoofer or stereo output of the car radio on a single input (left or right) or a Y adapter. Connect the subwoofer positive to the positive terminal of the left channel and the negative to the negative terminal of the right channel. The impedance must not be less than 4 Ohms.

How do I use the high level input?

If your car radio does not have RCA outputs, you can connect the speaker wires directly to the high level input of the amplifier. Use the supplied connectors and make sure to connect a ground wire (black) for each input. Do not use RCA and High Level inputs simultaneously.

How do I eliminate excessive engine noise?

Route signal cables (RCA) away from power cables. Check ground connections and possibly add a second ground wire from the battery to the chassis. You can also isolate the amplifier with a timed ignition relay.

What speaker impedance should I use?

In stereo mode (2 channels), the impedance per speaker must not be less than 2 Ohms. In bridged mode (mono), the total impedance must not be less than 4 Ohms. Failure to comply can damage the amplifier.

How do I connect an additional amplifier?

Use the OUTPUT RCA jacks of the amplifier (Fig. 1,3). The input signal is routed in stereo to these outputs, allowing you to chain multiple amplifiers without loss of quality.

What should I do if there is a crackling sound at power on?

Disconnect the amplifier's input signal. If the noise disappears, use a timed ignition module or a different 12V source for the REMOTE wire. Never use the battery positive terminal directly.

How do I adjust the low-pass and high-pass filters?

For a subwoofer, set the switch (Fig. 1,6) to 'LP' and adjust the control (Fig. 1,8) between 40 and 150 Hz. For satellite speakers, use 'HP' and adjust (Fig. 1,7) between 60 and 1200 Hz. In 'FULL', no filtering is applied.

USER MANUAL GTI2200 Crunch

Please read the user's manual carefully before the installation and the first operation of the amplifier.

SPECIFICATIONS	GTi2100	GTi2200
Output Power RMS	2 x 60 W @ 4 Ohms	2 x 110 W @ 4 Ohms
	2 x 100 W @ 2 Ohms	2 x 200 W @ 2 Ohms
	1 x 200 W @ 4 Ohms bridged	1 x 400 W @ 4 Ohms bridged
Output Power Max.	2 x 120 W @ 4 Ohms	2 x 220 W @ 4 Ohms
	2 x 200 W @ 2 Ohms	2 x 400 W @ 2 Ohms
	1 x 400 W @ 4 Ohms bridged	1 x 800 W @ 4 Ohms bridged
Loudspeaker impedance (stereo)	2 - 8 Ohms	2 - 8 Ohms
Frequency Response	5 - 40 000 Hz (-3 dB)	5 - 40 000 Hz (-3 dB)
Total Harmonic Distortion	< 0,05 % (1 kHz)	< 0,05 % (1 kHz)
Signal-to-Noise Ratio	> 90 dB	> 90 dB
Input Sensitivity	0,2 V - 4 V	0,2 V - 4 V
Input Impedance	20 kOhms	20 kOhms
Lowpass Filter	40 - 150 Hz @ 12 dB/Octave	40 - 150 Hz @ 12 dB/Octave
Highpass Filter	60 - 1200 Hz @ 12 dB/Octave	60 - 1200 Hz @ 12 dB/Octave
Bass Boost	0 - 12 dB	0 - 12 dB
Operating Voltage	+12 V (9 - 15 V), negative ground	+12 V (9 - 15 V), negative ground
Fuse Rating	1 x 30 A	2 x 20 A
Dimensions (B x H x L)	251 x 55 x 185/215 mm	251 x 55 x 250/280 mm
All Specifications are subject to change

WARRANTY

This product meets the current EU minimum warranty requirements, if purchased in countries of the EU. To ensure your warranty policy keeps your original receipt proofing the date of purchase. Any damage to the product as a result of misuse, abuse, accident, incorrect wiring, improper installation, alteration of date code or barcode labels, revolution, natural disaster, or any sneaky stuff because someone messed up, repair or alteration out side of our factory or authorized service centers and any thing else you have done that you should not have done is not covered. This warranty is limited to defective parts and specifically excludes any incidental or consequential damages connected therewith.

IMPORTANT NOTES PRIOR TO INSTALLATION

• This device is only suited for a 12 volt system with negative ground.

• The radiated heat while operation requires sufficient air circulation at the place of installation. It is very important that the heatsink fins do not have contact with any metal parts or any surfaces which could impair air circulation. The amplifier may not be installed in small closed locations or spaces without air circulation (e.g. spare wheel recess or below the vehicle carpeting). We recommend the installation in the vehicle's trunk. Ensure sufficient protection against vibrations, dust and dirt.

• Ensure that the input and output cables are sufficiently separated from the power supply cables. Otherwise interferences may occur.

• Ensure the accessibility of the fuse and the operating elements after installation.

• The reliability and performance of the amplifier depends on the quality of installation. Preferably consult an expert to install the system, particularly if you want to install several loudspeakers.

INTERCONNECTION

POWER SUPPLY AND TURN-ON-CONNECTION

ATTENTION: Before you start with the installation, disconnect the ground connection from the vehicle's battery in order to prevent short circuits.

The power wiring which is usually installed in on-board car networks is not sufficient for a power amplifier's demands. Make sure that the power wires to GND and to the +12V terminal has been sufficiently specified. A cable crosssection of at least 10mm^2 must be used to connect the battery to the amplifier's terminals.

First connect the GND terminal of the amplifier to an appropriate ground connection at the chassis. To ensure a good connection, residue dirt and dust from the connection point. A loose connection may cause malfunctions or interferences noise and distortion.

Then connect the +12V terminal of the amplifier with the battery by using an appropriate cable including an in-line fuse. This fuse should be located very close to the battery; for safety reasons not more than 30~cm away. Only insert the fuse when the installation, including the connection of the loudspeakers, has been accomplished.

Then connect the remote turn-on-wire from the headunit with the amplifier's REMOTE terminal. A cable with a cross-section of 0.5mm^2 is adequate.

AUDIO SIGNAL CABLES

When installing the audio cables between the RCA outputs of the headunit and the RCA inputs of the amplifier, the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We recommend a separated installation, e.g. routing the power cable through the cable channel on the left side and the audio cables through the cable channel of your vehicle on the right side or vice versa. This prevents interferences due to crosstalk into the audio signal.

LOUDSPEAKER CONNECTIONS

• In 2-channel operation (i.e. one loudspeaker on each amplifier channel), the impedance must not be lower than 2 ohms for each speaker
• In bridging mode (two amplifier outputs combined) the impedance must not be lower than 4 ohms for the bridged output.
• Never connect loudspeaker cables with the ground of the chassis or the +12V supply voltage.

If the amplifier is operated with a too low impedance or incorrectly used, the entire sound system may be damaged. This means a warranty void in such cases.

SIGNAL OUTPUTS TO CONNECT ADDITIONAL AMPLIFIERS

The input signal on the INPUT jacks (Fig. 1,4) will be routed in stereo to the output jacks OUTPUT (Fig. 1,3). Thus the OUTPUT jack allows the connection of an additional amplifier.

OPERATING ELEMENTS

INPUT SENSITIVITY

The input sensitivity can be adjusted to any headunit. Turn the volume control of your headunit to the center medium position and then adjust the input level controls (Fig. 1,5) until you have an average medium level. This setting usually provides sufficient power reserves at optimum signal-to-noise ratio.

VARIABLE HIGHPASS FILTER

If the amplifier is to be used for mid-range/tweeter loudspeakers, set the switch (Fig. 1,6) to "HP". Set the desired cross-over frequency on controller (Fig.1,7). Thus to that only the frequencies above the chosen cross-over frequency will be amplified. This effectively minimizes distortions and overloads at lower frequencies. A good point to start is at 125Hz . For bigger loudspeakers (>20~cm) set the switch (Fig. 1,6) to "FULL". In this configuration the high pass controller (Fig.1,7) is without function.

VARIABLE LOWPASS FILTER

If the amplifier is used to drive a subwoofer, set the switch (Fig. 1, 6) to "LP". Set the desired crossover frequency by using the controller (Fig. 1, 8). Thus to that only the frequencies below the chosen crossover frequency will be amplified and the subwoofer plays more accurate and efficient.

VARIABLE BASS BOOST

With the bass boost controller (Fig.1, 9) you are able to adjust the bass level from 0 - 12 dB at 45 Hz.

HIGH LEVEL INPUT

The High Level Input is suitable to connect the amplifier inputs with speaker wires, if your headunit is not equipped with pre-amplifier RCA outputs. Extend therefor every regarding speaker cable from your headunit with appropriate speaker cables from your car audio retailer to the mounting location of the amplifier. Then connect the each matching loudspeaker cable with the cables of the included HIGH LEVEL INPUT jack like described below. Please ensure that a ground cable (black cable, GND) for each HIGH LEVEL INPUT connector must be connected, which you can branch from the ground terminal of the amplifier (GND).

NOTE: Never use the High Level Input and the RCA inputs at the same time. This may damage the amplifier seriously. The loudspeaker cables of the HIGH LEVEL INPUT must have no contact to the ground (GND) by any means.

PROTECTION CIRCUIT

The POWER-LED (fig. 1,1) lits up, if the amplifier is in operation.

The PROTECT-LED (fig. 1, 10) lits up, when the amplifier is overheated, or a short circuit occurs resp. a too low impedance load is connected to the speaker outputs. If this events, the internal built-in protection circuit shuts down the amplifier automatically. The amplifier should work again properly after you have solved the problems.

FIGURES (P.28-30)

CONNECTIONS AND CONTROLLER (FIG. 1)

(1) Power-LED
(2) Optional High Level Input for the speaker outputs of your headunit
(3) Audio signal outputs to run additional amplifiers
(4) Audio signal inputs
(5) Gain level controller
(6) Selector LP (Lowpass)/FULL/HP (Highpass)
(7) Highpass filter controller
(8) Lowpass filter controller
(9) Bass Boost controller
(10) Protect-LED

POWER SUPPLY AND TURN ON CONNECTION (FIG. 2)

(1) GND terminal for the ground
(2) REMOTE terminal for the turn on connection
(3) +12V terminal for the positive-connection of the battery
(4) Vehicle's battery
(5) In-Line Fuse (not included in the scope of delivery)
(6) Turn on wire from the headunit or the electrical antenna
(7) Fuse(s)

2-CHANNEL OPERATION STEREO (FIG. 3)

If you want to run the amplifier with the 2 line output channels from the headunit to drive 2 loudspeakers in stereo, connect the following setup:

(1) To the headunit, line output left
(2) To the headunit, line output right
(3) Loudspeaker left
(4) Loudspeaker right

1-CHANNEL OPERATION MONO (FIG. 4)

If you want to run the amplifier with the 2 line output channels from the headunit to drive a subwoofer, connect the following setup:

(1) To the headunit, line output left or subwoofer output
(2) To the headunit, line output right or subwoofer output
(3) Subwoofer

TROUBLESHOOTING

If you are having problems after installation follow the Troubleshooting procedures below.

Procedure 1:

Check Amplifier for proper connections.

Verify that POWER LED is on. If POWER LED is on skip to Step 3, if not continue.

1. Check in-line fuse on +12V power supply cable. Replace if necessary.
2. Check fuse(s) on amplifier. Replace if necessary
3. Verify that Ground connection is connected to clean metal on the vehicle's chassis. Repair/replace if necessary.
4. Verify there are 9 to 16 Volts present at the +12V power supply and the remote turn-on cable. Verify quality connections for both cables at amplifier, stereo, and battery/fuseholder. Repair/replace if necessary.

Procedure 2:

PROTECT LED is on.

1. If the PROTECT LED lit up, is a sign of a possible short in the speaker connections. Check for proper speaker connections and use an ohm meter to check for possible shorts in the speaker wiring. Too low speaker impedance may also cause PROTECT LED to lit up. This can also be a sign of driving the amplifier at very high power levels without adequate airflow around the amplifier. Shut off the system and allow amplifier to cool. Check that the vehicle charging system is maintaining proper voltage. If the previous items do not solve the problem, a fault may be in the amplifier.

Procedure 3:

Check Amplifier for audio output.

1. Verify good RCA input connections from the head unit to the amplifier. Check the entire length of cables for kinks, splices, etc.
   Verify an audio signal at INPUT, use e.g. another audio source for testing. Repair/replace if necessary.

Procedure 4:

Check Amplifier for a popping noise while turning on.
1. Disconnect input signal to amplifier and turn amplifier on and off.
2. If the noise is eliminated, replace the head unit or repair it.

OR

1. Use a different 12 Volt source for REMOTE lead of amplifier.

2. If the noise is eliminated, use a relay to isolate the amplifier from noisy turn-on output.

IMPORTANT: Never use the steady plus of the vehicle's battery. Use rather the ignition circuit for the power supply.

Otherwise the vehicle's battery may be discharged.

Procedure 5:

Check Amplifier if you experience excess Engine Noise.

1. Route all signal carrying wires (RCA, Speaker cables) away from power and ground wires.

OR

1. Bypass any and all electrical components between the headunit and the amplifier(s). Connect stere directly to input of amplifier. If noise goes away the unit being bypassed is the cause of the noise.

OR

1. Remove existing ground wires for all electrical components. Reground wires to different appropriate locations. Verify that grounding location is clean, shiny metal free of paint, rust etc.

OR

1. Add secondary ground cable from negative battery terminal to the chassis metal or engine block of vehicle.

OR

1. Have alternator and battery load tested by your mechanic. Verify good working order of vehicle electrical system including distributor, spark plugs, spark plug wires, voltage regulator etc.

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