2-Channel-Mode Twin Sub: 2 Subwoofer / Mono Bridged - Crunch GTR420.2 Owner's Manual

4 Channel Amplifier - Speaker- & RCA-Connection
2-Channel-Mode: 2 Subwoofers / Mono bridged
TWIN SUB - Switch CH1/2
• The TWIN SUB - Switch must be set this configuration to "ON"-Position.
• The controllers for HIGH PASS, LOW PASS and BASS BOOST for CH1/2 are in this configuration not in use.
The parameters for HIGH PASS, LOW PASS and BASS BOOST for CH1/2 will be taken from CH3/4.
INPUT MODE - Switch
• The INPUT MODE - Switch must be set in this conguration to "2CH"-Position.
X-OVER - Switch & Control CH3/4
• See page 17.
LEVEL INPUT - Control
• See page 17.
BASS BOOST - CONTROL CH3/4
• The BASS BOOST - Control increases the bass level at 45 Hz from 0 up to 12dB. Please use the Bass-Boost carefully.
BASS REMOTE
• The BASS REMOTE allows to control the Bass-Level of Subwoofer 1 on CH1/2 and Subwoofer 2
on CH3/4 simultaniously for example from the driver's seat.
BASS REMOTE
Connect RCA outputs
from head-unit with
RCA inputs (LINE
INPUT CH1/2).
CH1 / CH2 CH1 / CH2 CH3 / CH4 CH3 / CH4
GTR440.4 – GTR640.4
Cable connection
• Connect the INPUT of the amplifier to the head unit line output with a good quality RCA cable.
By connecting the RCA jacks OUTPUT with a additional amplifier, a full range signal will be
provided to the amplifier.
• Connect the subwoofers with the terminal block (CH1/2 + BRIDGED - SPEAKER OUTPUT
and CH3/4 + BRIDGED - SPEAKER OUTPUT ) of the amplifier.
• The minimum final subwoofer impedance must not be below 4 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.
20
Caution
Subwoofer 1
Subwoofer 2
4 - 8 Ohm
4 - 8 Ohm