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Design Features
Variable Crossover
A built-in 12dB/octave Butterworth filter with a crossover
point variable from 50Hz to 250Hz. (R750-1D & R1200-1D
have an additional 12dB/octave Infrasonic filter with a cross-
over point variable from 15Hz to 40Hz SS)
Power/Protect LED
Power LED illuminates blue when the unit is turned on. Protect/
Thermal LED illuminates red when amplifier overheats or short
circuits. The amplifier will automatically shut down if this occurs.
Punch EQ - Variable
This variable control works along with the crossover
switch on the amplifier, boosting the bass frequencies.
Power/REM Terminals
The Power and Ground Terminals are nickel-plat-
ed set-screw wire connectors and will accommo-
date 4 AWG. The REM Terminal is a nickel-plated
set-screw wire connector and will accommodate
8 AWG.
Variable Phase
The variable 0-180˚ phase control allows the listener
to change the arrival time of the subwoofer sound
waves relative to the same frequencies from the main
speakers.
PUNCH EQ.
FREQ. Hz
PWR /
PRT
MIN
MAX
50
250
SUB
–
–
+
+
+
LEFT
BRIDGED
GND
REM
B+
SUB
REAR
Speaker Terminals
The Speaker Terminals are nickel-plated
set-screw wire connectors (+ and -) will
accommodate 8 AWG.
Crossover Switch
Selectable switch for Low-Pass (LP) or
All Pass (AP) or High-Pass (HP)
Input Switch
Setting this switch to the connected inputs aligns the
output signal accordingly or can supplement signal to
additional channels when not connected.
GAIN
FREQ. Hz
GAIN
2/4/5 CH.
PHASE
PUNCH EQ.
X-OVER
SWITCH
5
7
5
7
3
9
3
9
0˚ - 180˚
0
6
12
LP - AP - HP
dB +
dB +
dB
1
11
1
11
2 CH. - 4 CH. - 5 CH.
50
250
REAR
–
–
–
+
+
SUB
REAR
L
R
RIGHT
LEFT
RIGHT
BRIDGED
FRONT
RCA Input/Pass-Thru Jacks
The RCA Inputs/Pass-Thru Jacks are nickel-plated to resist the signal degradation
caused by corrosion. The Pass-Thru provides a convenient source for daisy-chaining
an additional amplifier without running an extra set of RCA cables from the front of the
vehicle to the rear amplifier location.
FREQ. Hz
GAIN
PUNCH EQ.
X-OVER
5
7
3
9
0
6
12
LP - AP - HP
dB +
dB +
dB
1
11
50
250
FRONT
REMOTE PUNCH LEVEL
FRONT
HIGH LEVEL
INPUT
R -
L -
R+
L+
REAR
FRONT
High Level Inputs - Optional Inputs
Accepts High Level speaker signal when utilizing
the 4-pin Molex harness provided.
Design Features
Gain Control
The gain control is used to match the output of the
audio source.
Punch EQ - Selectable
This selectable control works along with the
crossover switch on the amplifier, boosting the
bass frequencies.
Remote Punch Level Control
Remotely control the subwoofer output
level of the amplifier.
illus.-1.1
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