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Rockford Fosgate Repair

How you can fix this amplifier that has blown mosfets while your on a budget. Most of car amps have these blown on the power side or the output side which is ...

User Comments

dbs2010 commented on 15 Jan 2013

I purchased them from Arrow Electronics. I believe they where IRF3615 and IRF6415. I dont remember the exact numbers on them. They had a strange spec on them of 150V DS. The P channel was hard to find. You probably can go higher on the Drain to Source volts if needed say 200V or higher. The power supply was 102 volts on the B+. I never went farther with this amp because one MOSFET blew again after replacing it. On idle, the current draw was about 2 amps.

Michael larcom commented on 31 Jan 2013

Nicely siad and thought thur.. just showing some of what works what is a plus to me.. Its nice to know what fets are working what and going what derection.. I got a BD1500.1 an see sparks going from a fet to a resister an the power supply makes a ring sound but works great.. where you think you can get the gain pots from?? mine are gruty sounding.

jorge daniel Villagra commented on 19 Feb 2014

hola tengo una potencia sound magus me puede ayudar a repararla le borraron los codigos de los integrados operacional son de 8 pines cada uno si le mando fotos del circuito usted me sabra decir que integrados pueden ir?? le dejo mi email [email protected]

dbs2010 commented on 10 Nov 2012

Cen-Tech P37772 is the meter. It was on sale in October. If you don't have a budget to buy a fluke, this is a great deal. I personally try to stay away from Radio Shack as much as possible. There prices are too high on a lot of there tools and parts.

Kevin Nieto commented on 11 Jul 2013

Have you checked a lil chip labeled "tl702" it's kinda near the transformer it's a ic chip. Usually when the output blows up that chip will go too and leave the amp in protection. I had a bd500 that was stuck in protection I had to replace that chip

Colin Jarrett commented on 05 Jul 2014

I have a punch 400a 4 channel plays but it get really hotter than normal, any idea what could cause that problem. It's used irf 540 transistor.

dbs2010 commented on 02 May 2013

If you did it yourself it would just be the cost of parts. If you took it to a professional you may pay up to $120 for repair.

Michael larcom commented on 28 Jul 2013

whats the correct name for the gain pot and the FZ pot or model numbers so i can find them.. mine are dirty need replaced..

Kevin Nieto commented on 11 Jul 2013

And the power supply fets are ALL n channel if look they are labeled 'MTP75N05HD' 75 amp 50v rated mosfets.

jose ruiz commented on 09 Apr 2013

Hey i could get one of those amps for 40 bucks is that good deal how much does it cost to repair it?

dbs2010 commented on 02 Feb 2013

You might try Mouser for new pots. Mouser has a lot of items, over 19,000 different pots.

TheSlapperMan commented on 10 Nov 2012

Thanks for all the great info. What is the model of the meter that you got from HF?

briankeith1007 commented on 01 Jan 2013

Who did you say you both the mosfets from?

Timothy Thompson commented on 25 Nov 2015

F O C U S

AMPLIFIER REPAIR CHALLENGE: Boneyard Rockford Fosgate Punch 150 vs Juan

Juan and Tony, who are working on the SMD Distortion Detector with me, drove up from L.A. for a meeting. After we handled our business, i decided to ...

User Comments

Technologic commented on 29 Jun 2011

@69mrcrash open ur hifonics amp up. look for any burnt components or broken solder joints look at the power mosfets, find the numbers on the front of the mosfets. go on websites i.e digikey. research that number. buy the replacements. unsolder the mosfets on the amp and solder, in replacement, the new ones making sure the one you unsoldered is replaced with the correct replacement. the main thing that goes bad on power amplifiers is the mosfets/transistors, ifthisdoesn'tworkthenbuyanewamp

thebassgeneratorinc commented on 27 Mar 2012

I would like to have Jauns contact number, I havea few soundstream referance 6.0's a 500 and a a80 amplifier that needs repaired as well as a Sherwood XATQ400 , Visonik T class 2000T as well as a few alifonia a400 and a12000's. I plan on using them in a my history show case in my car audi displays. 30 plus years has yelded a few of these blown jews. hit meback in my inbox please with more imfo. thanx

odin5150 commented on 20 Jun 2011

he had a DEAD AMP AND FIXED IT IT LIVES IT LIVES AWSOME WORK MAN FUCKING INSANE THUMBS WAY FUCKING UP BRO WHAT ALL WAS BURNT OUT OF IT BY CHANCE GIVE US A UPDATE ON WHAT THE FUCK WAS WRONG WITH IT IN THE FIRST PLACE DUDE UR THE MAD SCIENTIST OF AUDIO MAN STEVE IS LUCKY TO HAVE A TECK LIKE U UR SKILLED OUT THE ASS TO DO THIS MOST PPL WOULD HAVE THROWN IT AWAY

Ben Sinor commented on 02 Jul 2011

@wow1022 Lol its really not that easy. You need a lot of know how to correctly repair a broken amp. Lots of things can be done wrong. everything from temperature of leads to the amount of solder used. If you are going to DIY. Please read more online about soldering. Or you could get a new hifonics amp. Love ma brz1700.

quazy50158 commented on 21 Jun 2011

@meade916 Have you ever herd of the linear power earcandy van? This was back in mid to late 90's. Had strokers in it then had polk audio subs. Thats who tips is/was hell i dont know if they are in business still to be honest. They did very good work back in the day.

jeremy peace commented on 23 Jun 2011

sweet!!! them old RF amps were called cheater amps!!! cuz they always benched with more power than they claimed!!! then a bunch of no good copie cats started throwing out a RF name that was crap!!! blue logo vs red logo red is real deal blue is cheap crap!!!

Kevin Nieto commented on 24 Jun 2011

I like that version of punch 150 with the single seperate rectifiers those were the last of series with the 2N64xx outputs other than that the went with fets for output stage i just think the bipolar output punchs sound better.

BalesEric . commented on 23 Jun 2011

Steve, I have a MTX amp that has the EXACT same casing as that amp you have there. I shit you not the exact same, the back plate might be different but the top with the logo is 100% the same but of course with a different logo

Taylor J commented on 21 Jun 2011

How much would you charge me to fix a phoenix gold 2500 amp. When you connect it to the power supply and put the fuse in it pops right away. if it were cheap enough i would ship it to you. i live all the way in wisconsin lol

Ben Sinor commented on 02 Jul 2011

@meade916 I think you misunderstood my comment. I just found it funny that he said it was a clean signal at almost the exact time it showed clipping. I know he turned the gain up too high. Seriously. Get a sense of humor bro.

atlfreakdaddy commented on 21 Jun 2011

Now thats cool , great work, i love those series of punch amps, i still have a punch 45. i sold the punch 150 well over 10 years ago to a family member and i think he's still rocking it. IMO the best 150 watt amp ever made

chris verton commented on 21 Jun 2011

seriously bro...im pretty strapped for cash...but i been wanting to hook up my girls car for a while now...can ya afford any donations from your boneyard? anything will be appreciated.thx bro...keep bangin

meade916 commented on 02 Jul 2011

@BENSYARDSERVICE did you not see him bring the gain up into clipping/distortion and then back it down? Thats called setting the gain. Ever hear of it? God damn some people are ignorant.

abervintageman42 commented on 22 Jun 2011

@quazy50158 dbr was good at one point in time, way back when, now, nothing but crap, my friend had a sundown 4500 sent there 4 times and the problem still wasnt issued, theyre lazy

AugiTheGreat1 commented on 20 Jun 2011

i miss cassettes the sound was so much warmer it actually took skill to have a clean sounding system not just expensive subs highs and amps tunning was an art form oh well

Kevin Nieto commented on 08 Dec 2011

I'm pretty sure he used acetone to clean the corrosion? I seen this in some amps I've bought from ebay lol very nice work I have a punch 45 that needs repair...

916REDSKIN commented on 22 Jun 2011

I HAVE A HIFONICS BRUTUS AMP 1500 WATT RMS. THE HIFONICS LIGHTS UP BUT THE POWER LIGHT ON THE SIDE OF THE AMP DOESNT COME ON! DO YOU KNOW WHATS WRONG WITH IT?

xTEAMxRENAGADEx commented on 06 Mar 2012

ok so im kinda new to the whole car audio stuff but i have a polk audio dxi 12 inch sub and 2 rockford fosgate p1's 10 inch what a good size amp to have

meade916 commented on 02 Jul 2011

@BENSYARDSERVICE sorry bro, youtube users have ruined part of my sense of humor. I dont know when the hell you guys are joking and when you are serious.

Francisco Solis commented on 22 Jun 2011

aren't Tony and Juan r&d for boss audio? since they worked for Rockford Fosgate does this mean that people can expect good quality amps from Boss?

Erik commented on 25 Jun 2011

@meade916 haha yeah if he feels like getting low ball requests that aren't even worth his time "hey my amp doesnt work can you fix it for 20$??"

Joshua Wallace commented on 07 Jan 2012

Steve, i have the same p150 as in this video and one of the channels sounds really distorted, yet the other one is just fine, any ideas?

dvastation.squad commented on 22 Jun 2011

Hey wats popin that was pretty amazing. I have a kicker 1500 mono that stopped working n was wondering if I could send it ur way?

raolito1980 commented on 23 Jun 2011

@meade916 I will never ask DB-r again. got turned down twice already. 2 different amps. Twice they referred me to other shops.

Ben Sinor commented on 02 Jul 2011

Lol at the camera guy that didn't see the oscope show clipping. "man that looks clean" as the clipped signal was showing. LOL.

iwalklikedat12 commented on 23 Jun 2011

i got a alpine amp thats fried out its pretty old its the 100 watt id like an estimate on how much it would cost to repair it

Technologic commented on 20 Jun 2011

looks like he changed all the power MOSFET/Transistors, alot of times those are the ones that cause problems with amplifiers

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