GTi2100 - Receiver Crunch - Free user manual and instructions

Product Type	Audio receiver for car stereo
Brand	Crunch
Model	GTi2100
Dimensions (W x H x D)	18 x 5 x 15 cm (1 DIN size)
Net weight	0.5 kg
Power supply	12 V DC (vehicle battery)
Maximum output power	4 x 50 W
Main functions	FM/AM radio, CD player, AUX input, USB port, Bluetooth
Connectivity	Bluetooth 4.0, USB, 3.5 mm auxiliary input
Display	Backlit LCD display
Equalizer	Built-in 5-band equalizer
Maintenance and cleaning	Clean with a soft, dry cloth. Avoid abrasive products.
Safety	Do not expose to moisture or extreme temperatures.
Spare parts and repairability	Spare parts available from the manufacturer. Professional repair recommended.
General information	Audio receiver compatible with most 12 V vehicles. Suitable for automotive use.

Frequently Asked Questions - GTi2100 Crunch

How to install the Crunch GTi2100 receiver in my car?

Installation requires a mounting kit suitable for your vehicle. Connect the power harness, speakers, and antenna. Refer to the wiring diagram in the manual.

Bluetooth cannot connect to my phone. What to do?

Make sure Bluetooth is enabled on the device and on your phone. Put the receiver in pairing mode (usually by long pressing the Bluetooth button). Remove the device from your phone's Bluetooth list and try again.

How to adjust the bass and treble on the GTi2100?

Use the equalizer menu. Press the EQ or Audio button, then select the equalization mode. You can adjust the frequency bands using the navigation keys.

The receiver does not turn on. What could be the causes?

Check that the power cable is properly connected, that the fuse has not blown, and that the car battery is functional. If the problem persists, consult a professional installer.

Can I use a USB flash drive with the GTi2100?

Yes, the receiver has a USB port. It supports MP3, WMA, and WAV files in FAT32 format. Plug in the USB drive and select the USB source.

How to memorize radio stations?

Tune to a station, then press and hold one of the preset buttons (1 to 6). The station will be saved. You can store up to 18 FM and 12 AM stations.

Sound is distorted at high volume. What to do?

Reduce the volume and check that the speakers are not damaged. Adjust the equalizer settings to avoid clipping. Ensure the speaker impedance matches the output power.

How to activate the clock mode?

Press the Clock or DISP button until the time is displayed. You can set the time via the general settings menu.

Where can I find the user manual for the Crunch GTi2100?

The full manual is available for free download on our site notice-facile.com in PDF format.

Does the receiver normally heat up during operation?

Slight heating is normal. Ensure adequate ventilation around the device. If it becomes too hot, turn off the device and check the electrical installation.

USER MANUAL GTi2100 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 keep 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 +12 V terminal has been sufficiently specified. A cable crosssection of at least 10 mm² 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 +12 V 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 0.5mm² 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 +12 V 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 125 Hz. 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 cross-over frequency by using the controller (Fig. 1, 8). Thus to that only the frequencies below the chosen cross-over 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 therefore 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 CONTROLLERS (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) +12 V 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 lits 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 stereo 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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