Question about MTX Thunder 8302 Car Audio Amplifier

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Feedback issues. I have the thunder 8302 amplifier hooked up with good ground, good positive lead an a good remote wire. the subwoofer has feedback comming out before i hook up the rca cables from the radio to the amp. No sound input and still feedback?

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  • foostair May 28, 2009

    the feedback stays about the same and the music from the radio is there but very quiet even at amost full vol, very muffled. The gains are both at 1/4. When i move any dial or switch on the amp it doesn't help or worsen the problem

  • hoyzee1 May 11, 2010

    When you plug the rca cords into the amp does it hush the feedback down or does the feed back get amplified as well?

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Did you run your power and remote wires the same route as your RCA cables? If you dont run the RCA cables on the opposite side of the power and remote you will get feedback through your speakers. I run my power on the side closest to the battery along with the remote ( passenger in my case) and the RCA cables should be on the opposite side( driver side). They say the power current will create a disturbance in the RCA cables that you would hear as feedback. Hopefully this will help you.

Posted on May 29, 2009

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Rewire your stereo cables as such:

Red- positive - battery
Black - ground - chassis
Remote (Yellow) - ignition switch

The "LINE OUT" should go to your SUB-WOOFER.

The while-lined wires paired with the solid colored wires are either your Front LR and/or Rear L/R.

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All wires are hooked up but no lights come on, is


Hi Wex,

Wires being hooked up is fine. With no lights coming on the question becomes one of power.

Ground needs to be grounded.
+12VDC should have +12VDC
Remote should also have +12VDC when the stereo is on.

Check these with a volt meter. Negative lead on the ground terminal, Positive on +12V then Remote.

Both combinations should read +12VDC.

Next check the fuses if any that your amp has. Make sure they aren't blown.

Comment back if this doesn't point you in the right direction.

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I need help installing a 4 Channel Power Acoustik Amplifier to Two Pioneer Subwoofers. I hooked up the power wire to the positive battery terminal in the engine compartment. I then cut the power wire and...


You are doing right on what you described. I really like to work with a clearly described what involved in an issue.

Now we have to use a Voltmeter to check if there is power to the amplifier. If there is power to the amplifier terminal, then the problem is at the amplifier, not the connection. Let check it out:

1- Turn on your Kenwood radio, make sure to hear sound from your regular speakers.
2- Turn remote control knob to the mid level between min and max.
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4- Measure the Red wire power from the Amplifier to ground ( the bolt that you connect the negative power to see if there is 12V, if not trace back to the Fuse that you inserted between the positive terminal of the battery and the wire going through the firewall to correct it.
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1 Answer

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Make sure you run the Positive wire from battery on one side,which is normaly the drivers side. Then run the remote wire and the spearkers on the passininger side. Feedback comes from two places, Your radio or your amplifiers. If running to amps always run sepert positive wires with 25amp fuses on each. For the ground (8g) and power wires are always best at 4g or 8g wiring. The ground wire must go to a clean spot of metal that is ether the frame or chasey of the car. Plus use metal srew to mount the ground wire. If it is not giving you feedback then thats a good ground which is ok to mount 2 or 3 amps max. If you still hear feedback, it's time to look at the radio and make sure the ground wire is good.

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1 Answer

What wire do i hook the remote wire to coming from the amp?


Hello cjfatback,

You want the blue/white wire.

Here's what the manual shows:

Red - Power (to ACC in vehicle)
Black - Ground
Yellow - 12V positive (battery lead)
Blue/White - External Amplifier Control Lead
White - Left Front Spkr +
White/Black - Left Front Spkr -
Gray - Right Front Spkr +
Gray/Black - Right Front Spkr -
Green - Left Rear Spkr +
Green/Black - Left Rear Spkr -
Violet - Right Rear Spkr +
Violet/Black - Right Rear Spkr -
The red and white RCA pigtail leads is for AUX input
Left set of Preamp Outputs - Rear Channels
Right set of Preamp Outputs - Front Channels
Only Models C3433U, C3304U, and C3333U have a 2nd set of RCA pigtail leads for subwoofer output.

Hope this helps.

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There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

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1 Answer

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"is the got two wires in the ground and remote turn on wie"
Can you be more specific about the wiring...where the two wires are connected to and where they come from, and I'll try to help you.

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Audiobahn A 18001DT


the remote of amp. is not a ground it is a pos.+ 12 vlts look the back of your car stereo red the remote and conect to remote of the amp. if no sign remote of the car stereo conect to the 12 vlts of your bat.

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could be bad mosfets or outputs, needs replace

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