4-Channel-Mode: 2 Frontspeakers / Stereo & 2 Rearspeakers /Stereo - Crunch GTR420.2 Owner's Manual

4 Channel Amplifier - Speaker- & RCA-Connection
4-Channel-Mode: 2 Frontspeakers / Stereo & 2 Rearspeakers /Stereo
X-OVER - Switch & Control CH1/2 and CH3/4
• If larger than 20 cm speakers are used, the "FULL" position is recommended.
• For all smaller speakers (8.7cm - 16cm) the "HP"-Position (HIGH PASS) is recommended, which
eliminates the lowest frequencies and protects the speakers from damage. Set the crossover-frequency
between 10Hz - 1200Hz, depending on the size of the installed speakers. The Highpass adjustment can be
done with the HIGH PASS - Control. In this configuration the LOW PASS - Control is not in use.
LEVEL INPUT - Control CH1/2 and CH3/4
• Turn the LEVEL INPUT - Control on the amplifier to "4V" position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the LEVEL INPUT - Control clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT - Control slightly until you can hear clean sound.
BASS BOOST CH1/2 and CH3/4
• Turn the BASS BOOST - Control into "0dB" - position.
BASS REMOTE
• In this configuration the BASS REMOTE is not in use.
Connect RCA outputs
from head-unit with
RCA inputs (LINE
INPUT CH1/2 & CH3/4).
CH1 / CH2 CH1 / CH2 CH3 / CH4 CH3 / CH4
GTR440.4 – GTR640.4
Cable connection
• Connect INPUT of the amplifier to the head unit line output with good quality RCA cables.
By connecting the RCA jacks OUTPUT with a additional amplifier, a full range signal will be
provided to the amplifier.
• Connect the speakers with the terminal block (CH1 +/- und CH2 +/ - SPEAKER) and
(CH3 +/- und CH4 +/ - SPEAKER) 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.
Please avoid to connect speaker (-) to the ground or vehicle chassis.
19
Caution
Rearspeakers 2 - 8 Ohm
Frontspeakers 2 - 8 Ohm