Memphis Audio, Established 1965, Memphis TN, USA | www.memphiscaraudio.com
Amplifier Controls
SRX18SPT
BASS TUBE
SR
S T R E E T R E F E R E N C E
200Hz
50Hz
MAX
MIN
LOW INPUT
SUB REMOTE
HIGH INPUT
L+
L-
R-
R+
GAIN
LPF
PWR
PRT
+12
REM
GND
FUSE
High Input:
Use this input to connect and operate from a source that uses speaker level outputs. When installing in this manner you must
Sub Remote:
The included bass level control knob can be attached to this port to control and adjust the level of bass produced by your
SRX18SPT.
RCA Inputs:
Source units with RCA line level outputs can be connected to these inputs. The source unit will require a minimum of 100mV
output to utilize the RCA inputs.
LPF - Low Pass Filter:
Adjustable from 50Hz to 200Hz. The LPF filter removes signals over the selected frequency allowing only signals below
the filter point to pass. This removes high notes from above the selected point from being played through your subwoofer.
PRT - Protection Mode:
When the amplifier enters protection mode this light illuminates RED
PWR - Power:
When the PWR button illuminates , the amplifier is ON
Gain Control:
The gain control knob allows you to set the input sensitivity of the amplifier to the source unit being used. The gain control is
not a volume knob. See below for gain setting. The range varies from 100mv to 6V.
Gain Adjustment:
Turn the gain control counter clockwise all the way to MIN
Turn up the volume on your source unit up to approximately 75% of max volume.
Increase the gain control knob clockwise towards MAX until distortion occurs
Back down the gain control knob counterclockwise until distortion dissipates.
Once the distortion is eliminated, the amplifier is set for use with your source unit.
SRX18SPT
BASS TUBE
SR
S T R E E T R E F E R E N C E
Use this input to connect and operate from a source that uses speaker level outputs.
blue
When the PWR button illuminates , the amplifier is ON
