Help, sons Sub blown

[PMAT 2,061]

A little help please. My sons Rockford Fosgate car sub stopped working. Fuses blown. I had him replace the fuses. they blew again. He and I pulled it apart and it looks like a class D amp in the box with a 12 inch sub driver. the leads which are woven through the spider material and burnt to a crisp. I bought a JL sub driver off ebay and its on its way. I was looking for an amp as well but the original amp might be good. I don't want to install the JL just to blow it up. How should I proceed? I have an old 6 inch woofer I could fry I guess. Ideas?

[Gene C 1,753]

Photos please. Which Punch model is it? Is it this thing? http://www.crutchfield.com/S-8tYU97JIfB3/p_575P30012/Rockford-Fosgate-Punch-P300-12.html

 

May want to get away from that design and go with something different. Throwing money at a $300 item when you can put new or used box together with an amp... The later option would be better. I'm a big Rockford Fosgate guy and still rock their amps, but am not a fan of their self powered boxes. If it's for space, I completely understand but that didn't stop me from putting 2 10" Boston's along with an amp and a spare battery all behind the bench seat. There ain't much room in an 89 Z-71 single cab.

 

[PMAT 2,061]

YES! That is exactly the one. My 17 year old drives a gorgeous Jag XJR supercharged 8 cyl. Not much room. I guess plan B is ok and Ill pick up an amp too. Life has been very expensive lately, ya know? I think Ill just use the same box for now. all he needs is thump. Its got to HIT!

He is going to be my one audiophile kid though.

[Daddyjt 9,868]

I gree with Gene - love Rockford's stuff, but not a fan of anyone's "all in one" subs. I run a rockford shallow mount 10" in a custom box, under the back seat of my '13 3/4 ton Chev crew cab.

 

If you want to check the amp, it's DC current at the output that will fry the driver. Just check the binding posts with a DMM set to DC volts. Anything over a 100mv or so is cause for concern....

[PMAT 2,061]

Thanks brother

[Bean 384]

I run a rockford shallow mount 10" in a custom box, under the back seat of my '13 3/4 ton Chev crew cab.

 

Thats it? I expected like 4 18" woofers taking up the entire bed with port tubes into the cabin

[Retriever 1,143]

I doubt the original amp is any good, classic class D failure.

Inductor gets hot inside the amp inductance collapses resulting in straight pwm sent to woofer, mosfet then failes which in turn puts DC into woofer who is the last item to burn up.

[PMAT 2,061]

That's the post I needed. Thanks mr moderator. Classic Class D detonation. Damn junk. In the trunk.