Functions & Controls - Crunch GTR420.2 Owner's Manual

4 Channel Amplifier - Functions & Controls
X-OVER - Switch CH1/2 and CH3/4
Select the desired Operation-Mode.
Position HP - High pass filter ist activated and the
frequency range is cut-off below.
Position FULL - Full range output signal
Position LP/BP - Low pass filter ist activated and the
frequency range is cut-off above.
LINE
OUTPUT
BASS REMOTE
R
L
PROTECT
POWER - LED
Indicates the
amplifier is in
operation-
mode.
OUTPUT- RCA
BASS REMOTE - Terminal
Provides a full range line
level (RCA) output that Terminal jack for the supplied BASS
allows the use of REMOTE. With this remote you are able
additional amplifiers to adjust the Bass Level for example
from the driver's seat.
PROTECT - LED
Indicates the fault operation of the amplifier. When the fault conditions (overload, excessive heat or short circuit of speaker) arise,
the protection curcuit is engaged to protect the speakers and the amplifier against damage.
Attend in this case TROUBLE SHOOTING on page 22.
GTR440.4 – GTR640.4
HIGH-/LOWPASS - Control CH1/2 and CH3/4
HIGH PASS - The built-in high pass filter is fully variable from
10Hz to 1200Hz and cut-off the lower frequencies.
By choosing the LP/BP mode on the X-OVER switch, the
BANDPASS-Mode is activated. By adjusting the HIGH PASS
Contoller, the Subsonic-Frequency (Lower Frequency cut-off)
ist adjustable.
LOW PASS - The built-in low pass filter is fully variable from
30Hz to 150Hz and cut-off the higher frequencies.
X- O VER LEVEL I NPUT BASS B OOST
LP/BP HP FULL
0.2V
4V 0dB 12dB
LEVEL I NPUT BASS B OOST
X- O VER
4V 0.2V 0dB 12dB
LP/BP HP FULL
PWR
LEVEL INPUT - Control
CH1/2 and CH3/4
Adjusts the line level (RCA)
inputs from 0.2 to 4 Volts.
18
BASS BOOST - Control CH1/2 and CH3/4
Allows you to adjust the bass boost from
0dB up to 12dB at 45 Hz.
LINE INPUT
CH3
LOW P ASS HIGH P ASS
INPUT MODE
BPF
4CH 2CH
30Hz 150Hz 1.2kHz
10Hz
LOW P ASS HIGH P ASS
OFF ON
BPF
30Hz 150Hz TWIN SUB
10Hz 1.2kHz
CH4
TWIN SUB - Switch
When this Switch is
set to "ON" the same
adjusted Parameters
of CH 3/4 for HIGH
PASS, LOW PASS
and BASS BOOST
are taking effect on
CH1/2. Only the INPUT
LEVEL must be
adjusted. This is only
suitable for an operation
with 2 subwoofers.
CH1
CH2
LINE INPUT - RCA
Allows to connect the
amplifier with the head
unit via RCA cable.
INPUT MODE - Switch
If on LINE INPUT only
CH1/2 is occupied,
switch
to the "2CH" Position. If
all four jacks are in use,
switch to "4CH" position.