I was supposed to be fixing these amps for a friend of a friend but he stopped calling about them. And Im told that he has some new gear. So Im taking that as theyre mine now.
Diamond D3 1000.1 2008 model
1000 at 1 ohm. Solid amp from what I read.
On to the carnage. I opened the case and I smelled something burnt. Nasty nasty smell. This is what I found:
Blew the MOSFETs quite thorougly. Two of them are missing halves of themselves. Lifted the solder out of a few of the tabs. But it looks repairable. Im going to price out some new ones tonight after work.
Memphis PR300.2
300 watts per channel at 2 ohm. This thing is a brick its about 13 inches long.
And more blown MOSFETs. Im not sure if I can fix this one. Looks like one of the diodes blew on the board. But Im not sure if you can see it in the pic.
Wish me luck.
good luck! sounds fun!
click sig for my car audio videos
Uh, brian, fets usually don't fry on their own. You're going to have to check the input and output as well, and on the 2nd board, those are resistors.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
They fry if you crank the bass boost feed it a clipped signal and very dirty power. Hahaa.
Got some transistors for the Diamond today.
You're not listening. Do you know how to properly test an amp to see if the transformers, input and output are good?
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
Voltage comes in DC, audio comes in AC, gets amplified, comes out A/C. So you have a power supply, input, and output. If your output goes bad, it can feed DC to the speakers and cook them. There's a bunch of different scenarios, and even I haven't done the research on how to properly test all the components. But I do know that it isn't as simple as replacing fets and being done with it for the most part.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
Well Im going to replace the fets and check the output once its fixed. Its not a big deal if i cant fix it. Im only out a few bucks.
First time i've ever seen MOSFET's do that. I run 2Kw of RF with MOSFETS ( Amateur radio of course) and have never seen something like that.....OPPS!
Matthew
The Radio Guru
NewCap Radio Inc.
