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7. High Input - High level is done through the included wire harness.
8. Speaker Terminals (+ / –) - Connect speakers to these terminals. Observe speaker polarity
throughout the system. Improper phase can result in loss of bass response and/or poor overall
sound quality. MTX recommends using 14 AWG speaker wire with the MTX TNA500D amplifier.
9. Power Terminal (+12V) - This is the main power input for the amplifier and must be connected
directly to the positive terminal of the vehicles battery for proper operation. Use caution when
installing (+12) power cable in the vehicle. Avoid running this cable parallel with RCA cables,
antennas, or other sensitive equipment due to massive currents that can induce noise into the
audio system. It is also very important to have a tight, secure connection for maximum
performance. MTX recommends using 8 AWG power wire with the MTX TNA500D amplifier.
10. Remote Terminal - The amplifier can be turned on by applying 12 volts to this terminal. Typically
this voltage is supplied by a wire from the source unit marked "remote".
11. Ground Terminal - A proper ground is required for your amplifier to operate at peak performance.
A short ground cable the same diameter as the power cable must be used to attach the ground
terminal directly to the chassis of the vehicle. Always remove paint, dirt or debris to expose bare
metal where the ground will be attached.
6
CONTROL FUNCTIONS
M T X . C O M
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