Channel Amplifier - Applications; One 4 Channel Amplifier With Front-/Rear Speakers - Crunch GP1000.2 Owner's Manual

One 4 Channel Amplifier with Front-/Rear Speakers

X-OVER SELECT (CH1/2 & CH3/4)
• If larger than 20 cm speakers are used, the FULL position is recommended.
• For all smaller speakers (Ø8.7cm - Ø16cm) the Highpass-Position (HP) is recommended, which eliminates the lowest
frequencies and protects the speakers from damage. Set the crossover-frequency between 60Hz - 150Hz, depending of the
size of the installed speakers. The Highpass adjustment can be done with the FREQ - ADJUST control.
INPUT LEVEL (CH1/2 & CH3/4)
• Turn the INPUT LEVEL controls on the amplifier to 5V position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the INPUT LEVEL controls clockwise until you hear some distortion.
• Then turn back the INPUT LEVEL controls slightly until you can hear clean sound.
BASS BOOST (CH1/2 & CH3/4)
• Turn the BASS BOOST control into "0dB" - position.
MODE SELECT
• The MODE SELECT - switch from CH1/CH2 must be in "4" - position and the MODE SELECT - switch from the CH3/CH4
must be in "STEREO" - position.
Connect RCA outputs from head-unit with
RCA inputs (INPUT CH1/2 and CH3/4).
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4 Channel Amplifier - Applications

GP1000.4 / GP1500.4
Interconnect cable checklist:
• Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT
CH1&2 / CH3&4 of the amplifier.
• Connect the Front-/Rear Speakers with the terminal blocks (SPEAKER OUTPUT / + CH1 -
, + CH2 -, + CH3 -, and + CH4 -) of the amplifier.
•The minimum final speaker impedance must not be below 2 Ohm per channel. Too low
speaker loads result in too high heat dissipation and may cause the amplifier run into
protection.
• Please observe speaker channel and polarity as printed by the speaker terminal block.
Incorrect phasing of the speakers results in total loss of bass response.
Be careful not to connect speaker (-) to the ground or vehicle chassis.
Caution
Rear-Speakers 2 - 8 Ohms
Front-Speakers 2 - 8 Ohms