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HIGH INPUT
L + L
1. Gain Control - The gain control matches the input sensitivity of the amplifier to the source unit
being used. The operating range varies from 200mv to 10V.
Adjusting the gain:
1. Turn the gain control on the amplifier all the way down (counter clockwise).
2. Turn up the volume control on the source unit to approximately
3. Adjust the gain control on the amplifier until audible distortion occurs.
4. Adjust the gain control down until audible distortion disappears.
5. The amplifier is now calibrated to the output of the source unit.
2. Remote Control Port - Use this port to connect the included MTX EBC. It allows you to control the
output level siting at the front of the car.
3. RCA Inputs - These RCA inputs are used with source units that have RCA or Line level outputs.
(Source units need a minimum level of 100mV output for proper operation of the amplifier). MTX
recommends only high quality twisted pair cables (such as StreetWires) to decrease the
possibility of radiated noise entering the system.
4. Power On / Protection LED - The LED illuminates red when the amp is switched on. When the
amp is in thermal protection, the LED will blink steady. The amplifier will resume after cooling
down. When the amp is in short circuit the LED will blink in a burst sequence.
5. Subsonic - This control can filter out unwanted low frequency from 20Hz (OFF) to 50Hz. This
function should only be used with vented enclosures.
6. Low Pass X-Over Frequency Control - Use this to select the desired low-pass (LP) x-over
frequency. The frequency is adjustable from 40Hz to 200Hz.
CONTROL FUNCTIONS
7
3
1
INPUT
OUTPUT
GAIN
L
-
-
R +
G R
MIN
R
8
SPEAKER OUTPUT
–
+
M T X . C O M
6
5
LPF
SUB
REMOTE
SONIC
MAX
40Hz 200Hz
20Hz
50Hz
4
9
10 11
+ 12V
FUSE
REM
POWER INPUT
⁄
3
4
2
GND
TNA500D
of maximum.
5
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