Question about MTX Car Audio & Video

1 Answer

I have a mtx thunder 7801 series amplifier well i got a stereo from someone and i didnt know it a the time but it had the wrong plug in the back of it so when i hooked my amp up to it what i thought was the remote wire wasnt and as soon as i hit the power button on the stereo if fried the fetts from the circuit board to the heatsink can this be fixed

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 82 Answers

The short answer is probably yes... easily, probably no. If you are lucky and only have one or two shorted transistors, then you can cut the leads on those and see if it powers up without blowing a fuse. Also check for shorted diodes and burnt resistors. If all FETs (or most of) the FETs mounted to the heat sink are shorted then it is probably not worth taking the chance putting the time and money into fixing it, just to have it smoke again. Also they are likely in parallel so it is a little more difficult to determine the bad one as they may not all be bad. Measure with an ohmmeter and find the one with the lowest resistance and remove that first and keep going until you believe you have gotten them all. Normally repairs like this are not for someone with little or no experience on amp repair, but if you feel like taking it on, good luck!

Posted on Apr 20, 2014

Ad

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
  • 113 Answers

SOURCE: my 7801 doesnt turn on

check pwm circuit amps turn on with 3-4 volts on mosfet gates ic 494, 5252or 555 controll these.hit me up for more

Posted on Aug 09, 2007

  • 31 Answers

SOURCE: i need help hooking this up

"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.

Posted on Mar 30, 2008

kcarmax
  • 30 Answers

SOURCE: i have a mtx thunder 7801 and a sledge hammer box

Sounds like the subs are blown with the voicecoils fused together which means the amp is/was seeing a dead short ( zero Ohms reisitence) not good for any amp. Disconnect the speaker terminals from the amp and see if it turns on. The funny smell might have been the subs blowing up, i'll keep my fingers crossed for you.

Posted on Mar 01, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why does my MTX thunder 702x amplifier cut on and off


Check fuse on amp under hood. Also, check wire connections makes none of them are loose and move your RCA jacks around to see if you have a short.

Jan 04, 2012 | MTX X Thunder 702X Car Audio Amplifier

1 Answer

Can you bridge 2 4 ohm kicker speakers to a mtx thunder 7801 amp?


Ya. Just hook one sub to your amp (bridged) and hook the other sub (positive and negative) to the first subs positive and negative

Nov 12, 2010 | MTX Thunder TA7801 Car Audio Amplifier

1 Answer

I have a mtx thunder 7801 and a sledge hammer box


Sounds like the subs are blown with the voicecoils fused together which means the amp is/was seeing a dead short ( zero Ohms reisitence) not good for any amp. Disconnect the speaker terminals from the amp and see if it turns on. The funny smell might have been the subs blowing up, i'll keep my fingers crossed for you.

Feb 28, 2010 | MTX Car Audio & Video

1 Answer

Why do my mtx 8100d amp keep cuting off


wrong wiring for the speakers. to low of an ohm load so amp is going into protect mode. rewire to 4 ohm stereo.

Jan 18, 2010 | MTX Thunder 895 Car Audio Amplifier

2 Answers

Need help MTX 1501d amp diagram


Remove cover and set in direct sunny window for long time, may be no problem with it, Took a month to dry one of my amps out enough that it decided it would come back to life, cell phone dropped in sink took 2 weeks, If you try power to it too soon --fried--, good luck finding diagram and repairing it sincerely-hope its okay, good amp, bad luck,

Mar 13, 2009 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Amp works fine i think??? but Prsim efx not working at all


You need to contact MTX tech support before the warranty runs out. You'll probably have to get an RA number to send it back.

 

http://www.mtx.com/caraudio/contactMTX.cfm

 

 

Oct 18, 2007 | MTX TA4501 Thunder 4501 MonoBlock Car...

2 Answers

My amp doesn't turn on...


If there is a zero ohm connection across the B+ and ground terminals, it should blow the fuse as soon as you apply power.

 

 

 

Oct 10, 2007 | MTX Thunder TA7801 Car Audio Amplifier

1 Answer

My 7801 doesnt turn on


check pwm circuit amps turn on with 3-4 volts on mosfet gates ic 494, 5252or 555 controll these.hit me up for more

Apr 03, 2007 | MTX THUNDER7801 SUPER AMPLIFIER CLASS D...

Not finding what you are looking for?
Car Audio & Video Logo

Related Topics:

44 people viewed this question

Ask a Question

Usually answered in minutes!

Top MTX Car Audio & Video Experts

hoyzee1

Level 2 Expert

150 Answers

yadayada
yadayada

Level 3 Expert

80339 Answers

RegWorts

Level 1 Expert

12 Answers

Are you a MTX Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...