Question about Orion 8004 Car Audio Amplifier

2 Answers

Amplifier repair i have a rockford fosgate amplifier. it recently stopped working and i would like to fix it on my own. any suggestions.

Posted by gballtheway on

  • 4 more comments 
  • Michael Sanson
    Michael Sanson Nov 12, 2007

    I keep blowin the same 2200 uf 80v. power supply Caps, (same 2 out of 5)

    I unhook everything before it does more damage.

    I replaced the blown 2 with the same rating, 100v this time, it playes fine until it basses hard for a few then blows them again.

    what should I look for next?



  • phantom007 Nov 22, 2007

    The amp just stoped working one day.So i took the panel off and hooked it back up again. Then i noticed the the red light would blink on and off, and the fan inside would also work but not really. It would slowly pick up speed as the power light would blink untill i herd a click sound and the hole process would start over again. The click noise would happen every 30 seconds. I want to try to fix the problem so if any one that knows why its doing what is doing please tell me what i need to fix the problem.

  • Anonymous Jan 09, 2008

    I know what i have to do to fix mine but the reason mine blew is because i hooked up the pos to the neg and the neg then pos...maybe thats your prob....

  • edwinr Feb 07, 2008

    i have a two channel punch amp and the negative from the right channel is burnt out

  • Emran82 Jan 01, 2009

    i want kenwood amplifier (kac 819) input transistors number
    total 6 transistors four transistors is c403 and two transistors is shot ( no number ) i want number

  • Anonymous Mar 16, 2009

    i have a two channel punch amp and the negative from the right channel is burnt out



2 Answers


  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 2 Answers

Change out the fan if cant find one specifically 4 that amp get a fan from a old amp or computer and use it there easy 2 switch out or even modify if it dont fit in the amp just mount it on the out side on the air fins the problem was probably caused by 2 small of a ground or in line fuse is 2 small check spec sheet or manual but the ground should b as short as posible and a bigger wire than the positive wire make shure your fuze in amp is the right size if 2 big it will over heat and fry the amp

Posted on Apr 26, 2009



  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 45 Answers

Unknown model not working could be a bunch of things!
does the unit have power?? fuse(s) ok?? turn on voltage present(12v)?? Any leds?? Unit ever get wet?? Any lites?? smoke get out?? was it, did it get real hot??
I have worked on a few with various problems, no common problems. Some of the things I have seen; Level adj pot was smashed in, Shorted fets , + burnt gate drive resistors in the ps section + blown runs, bad connections, shorted outputs, corrosion from beer leakage, bad electrolytic caps, leaking caps ate up the copper runs, metal bars used to hold down fets and outputs came loose, parts over heated and shorted.
Open up and look around, burnt resistors, leaking caps, puffed up caps, black marks, are all helpful signs.
These amps typically use FETs in the power supply(+/- 25-50v) and regular transistors for the outputs. Test all heatsinked parts for shorts. Carefully remove metal bars holding down heatsinked parts, keep track of where the heat sink insulators go, remove pcb and inspect runs. Repair and bench test with a power supply that has an amp meter. With out any input, unit should only use a few amps after initial 5-15amps to get the PS fired up. Then test across speaker outputs for any DC voltage. Anything over 1v, (should be very close to zero) amp needs some more work.
Good luck!

Posted on Nov 06, 2007


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Why did speakers get really loud, then stop working?

Have you checked the fuse on the amp and/or make sure the amp did not burn out?

Aug 01, 2015 | Rockford Fosgate Car Audio & Video

2 Answers

Rockford fosgate amp keeps shutting down when volume is cranked

your cd player cant handle all the power, time to upgrade to a cd player with at least 80w10

Jun 12, 2009 | Rockford Fosgate Punch P5002 Car Audio...

1 Answer

Left positive speaker input stopped working

try swapping over the rcas for instance if black is in r and red is in l then swap them so red is r and black is l

if that doesnt work try swapping the subs over to as you may have a faulty sub. if that doesnt work then check the fuses on the amp

still no joy then i would suggest taking your amp to your local car audio dealer and getting them to have a look at it

Hope this helps if so please dont forget to rate

best wishes

Upfront Audio

Apr 23, 2009 | Rockford Fosgate Punch® 450.2 Car Audio...

1 Answer

Rockford Fosgate Punch 401s starts then smokes

Can somebody email me the schematic for the Rockford Fosgate 401S?

Feb 04, 2009 | Rockford Fosgate Punch 401S Car Audio...

2 Answers

1000 crossfire bmf and a rockford fosgate that need to be fixed

send the rockford to landis technical-they bought up all the parts to rockfords amps and will get them back to factory specs and recertify it for ya along with a new power certificate-look on rockfords website and snoop around and it will break it on down for ya and give you the address n stuff. i had to send my 1501bd mono amp in to get an overhaul and it came back throwin 1810watts rms so that was better than when i started -good luck.

Jan 01, 2008 | Rockford Fosgate 360a2 Car Audio Amplifier

1 Answer

Old rockford fosgate power 1001bd

The 1001BD will produce it's rated power (1000 watts RMS into 2 ohms).

Nov 25, 2007 | Rockford Fosgate Power 1001BD Car Audio...

Not finding what you are looking for?
Orion 8004 Car Audio Amplifier Logo

336 people viewed this question

Ask a Question

Usually answered in minutes!

Top Orion Car Audio & Video Experts


Level 3 Expert

85239 Answers

Roy Funkhouser
Roy Funkhouser

Level 2 Expert

140 Answers

Charles Tidwell

Level 3 Expert

475 Answers

Are you an Orion Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides