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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.
4
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
PHASE
PWR /
PRT
0˚ - 180˚
MIN
MAX
50
250
SUB
+
–
+
–
+
LEFT
RIGHT
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.
PUNCH EQ.
X-OVER
PUNCH EQ.
SWITCH
5
7
5
7
3
9
3
9
0
6
12
LP - AP - HP
0
dB +
dB +
dB
dB +
1
11
1
11
2 CH. - 4 CH. - 5 CH.
50
250
REAR
–
+
–
+
–
REMOTE PUNCH LEVEL
SUB
REAR
FRONT
L
R
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
X-OVER
5
7
Gain Control
3
9
6
12
LP - AP - HP
dB +
dB
1
11
The gain control is used to match the output of the
50
250
FRONT
audio source.
Punch EQ - Selectable
This selectable control works along with the
crossover switch on the amplifier, boosting the
bass frequencies.
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
Remote Punch Level Control
Remotely control the subwoofer output
level of the amplifier.
illus.-1.1
5
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