20 Most Recent MTX Thunder 8302 Car Audio Amplifier Questions & Answers

your ground is the problem here, try moving your ground to a different spot or try double grounds

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I had this same amp and the rca inputs went out. If i wiggled the rca plugs sound would come out but when i let it go the sound stopped so see if the rca inputs move at all because they are not suppose to

It sounds like an Ic is to blame, Check individual channels to find which one is not working?

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.

The amount of power that youre going to run on those 5.25s might indicate that you need to turn the crossover to a higher cutoff frequency because they gonna want to kick pretty hard if your set too low - Sounds like you got it under control though flip it to high-pass(HP) and see how it does at around 100 HZ cutoff- be sure to turn off any bass boost on the amp though too- Let me know how them soundstream mids do- I have a set of subs that kick *** but i never have heard anything about their mids-good luck

What sort of problem are you having?

Depending on where you live, Car Tunes is a good place to fix it but it might cost a good amount. I have a mtx 1501XD and the same problem, lights but no sound i saw no marks inside mine however. They told me i was better off buying a new one bc it was going to cost so much to fix most likely. That was coming from a guy I know so they were just trying to **** money out of me either, he does sound for a living.

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

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

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.

could be bad mosfets or outputs, needs replace

hi Dan....Have you had any other service or installs shortly prior to the onset of clipping? In any case, the 8302 has Onboard Thermal Protection which is kicking in due to excessive heat. If you've had this running fine for a period of time, by that I mean at least a month, then we need to focus on why you're suddenly overheating......please update your post with any further information and progress.....good luck my friend

sounds like an internal problem. first disconnect all spks from amp, then switch on head unit and check if amp turns on (LED ON?) then feel the heatsink, if heatsink gets terribly hot then amp has internal fault. if amp doesnt get hot then try connecting a single working speaker to each channel separately, it may occur that one channel is faulty only. amps can shut down if the speaker/s is faulty as well, check all speakers and spk wires for shorts before taking amp in for repair. cheers

hi, first disconnect the rca input, then switch on headunit and if the amp produces a constant bass thump it then means it has an internal fault. if the amp idles quietly then replace the rca cable, or try connecting the headunit lineout feed directly to the bass amp, in this way you cud find out if your fault is coming from the headunit or the equaliser. cheers

yes, the overvoltage...compounded by maybe an alternator that is also not operating within limits (Does your headlights or horn get brighter / louder?). look inside the amp for any adjustable device for OVER VOLTAGE THRESHOLD or similar and turn it slightly clockwise

10 to 20 minutes? that sounds like a internal problem in the amp. I have never heard of a amp taking that long to start up, there is definatly a problem in the pre amp stage of the amplifier.

You'll need to replace all three transistors and any other in the same line (unless they're divided by high power diodes). Make sure you check all resistors before replacing anything. Search www.digikey.com for parts, they should have the exact transistors-just put the numbers on the transistors into the search field.