Troubleshooting - MTX TX81000D Owner's Manual

Installation & Mounting :
3. Install a positive (+) power cable from the vehicle's battery through the firewall using a grommet or firewall bushing to avoid cable damage from sharp edges of the
firewall. Run the cable through the interior of the vehicle and connect it to the amplifier's (12V) terminal. Do Not connect to the battery at this time.
Note : Use only proper gauge wire for both positive and negative connections.
4. Install a circuit breaker or fuse within 20cm of the battery. This effectively lowers the risk of severe damage to you or your vehicle in case of a short circuit or accident.
Make sure the circuit breaker is switched off or the fuse is taken out of the fuse holder untill all connections are made. Now connect your positive power cable to the positive
battery terminal of the battery.
5. Grounding - Locate a proper ground point on the vehicle's chassis and remove all paint, dirt or debris to reveal a bare metal surface. Attach the ground wire to that contact
point. Connect the opposite end of the ground wire to the (GND) terminal on the MTX amplifier.
6. Connect a Remote Turn-on wire from the head unit to the MTX amplifier's Remote terminal. If the head unit does not have a dedicated Remote Turn-on lead, you may
connect to the head unit's Power Antenna lead.
7. Connect RCA cables from the head unit to the MTX amplifier's RCA inputs. Run all signal cables away from vehicle wiring, computers and power cables. If cables must be
crossed do so at a 90° angle. Use only high quality RCA cables to decrease radiated noise from entering the system.
8. Connect your speakers to the MTX amplifier's speaker terminals using proper gauge wire.
9. Double check all previous installation steps, in particular, wiring and component connections. Once verified, reconnect the vehicle's negative battery cable, turn the circuit
breaker on or place the fuse in the fuse holder.
Note : Gain Levels on the amplifier should be turned all the way down (counter clockwise) before proceeding with adjustments.

Troubleshooting :

Problem
3 LEDs are off
3 LEDs are flashing red
3 LEDs are solid red,
but no output
Output distorted
Balance reversed
Bass is weak
Blowing fuses
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Cause
No +12V at remote connection
No +12V at Power connection
Insufficient ground connection
Blown power fuse
Blown amp
Speaker load is too low
The amp is in thermal protection
Input tension is too high or too low
Volume on head unit off
Speaker connections not made
Gain control on amplifier set to minimum
Signal processing units off
All speakers blown
Head unit volume set too high
Amplifier gain set too high
Speakers wired reversed
RCA inputs reversed
Speakers wired out of phase
Not using MTX woofers
Excessive output levels
Amplifier defective
Solution
Supply +12V to terminal
Supply +12V to terminal
Verify ground connection
Replace fuse and try to understand why
Return for service
Remove the speaker(s)
Wait for the amp to cool down
Check your battery and your alternator
Increase volume on head unit
Make speaker connections
Turn up gain
Apply power to signal processor
Replace speakers
Lower head unit volume
Lower amplifier gain
Wire speakers with correct orientation
Reverse RCA input
Wire speakers with correct phase
Buy MTX woofers
Lower the volume
Return for service