sub amps keeps overheating

my radio has 4v preouts...isn't that pretty good? What voltage are line drivers? Also, who makes a good line driver and where to buy?

 

I looked through the manual for the radio and didnt see a source level adjustment.

 

There's no clipping indicator lights on the amp. I turned the gain all the way up, because this is where it sounded good. At 3/4 gain, it sounded whimpy(not much bass). My radio does have a sub level output. I'm gonna max that out and turn the amp gain down and see how that goes. I bet I'm overlooking something dumb. Gonna re-read the install manual this weekend. I'm also going to buy a line driver....and install a fan. If you guys have any other ideas, let me know.

 

Yeah...looks like I have a lot of adjusting to do with my radio. I'm not used to these complicated new radio's. I'm oldschool. I was into car audio in the early to mid 90's. Just kind of got back into it to use some equipment I had on the shelf for a long time. The radio has a built in eq, parametric eq, and sub output. I'm gonna turn the amp gain down to about 3/4....then start adjusting things on the radio. Hey, my fans came in today....another project! I also ordered an 8v line driver. I'll let you guys know how everything turns out in the next few weeks. I have so many other things to do, the radio stuff is kind of on the back burner.

 

also, no mono button on my amp!

 

Electrolytic, that 2100 HCCA is(was?) a hardcore amp. How was it before you blew it up? What happened?

 

Guess what?.....I think I found the problem! I pulled the RCA's out of my sub amp so I could listen to the rest of my system. Now my left front speakers aren't working! It's always something. Anyways, after having my stereo on for about 5 min, without the sub amp playing....I touched it and it was hot in the upper right corner. I took the amp out, and took it apart. The transistors are under metal hold down clips. I removed them all and found 2 burnt transistors. On page 10 of the manual, they are in the lower right corner of the circuit board, labeled "PRS power supply mosfet switches". Its funny that it still played well for a little while with these toasted. So, I'm gonna keep this amp for spare parts and install another one. Bought this bad one on ebay...looked mint too. Almost perfect heatsink and really nice looking circuit board. I just never looked under those hold down clips! Those transistors even left black marks under the metal clips. Guess ebay or buying anything used is a crap shoot.............now I have to figure why my front left doesnt play???? Checked fader and balance, so either my other amp blew that channel or its my crossover for those components. I'll figure it out tomorrow.

 

Who makes a good 4-channel amp? Something around 50 x 4. How are the Alpine amps? One channel is now out on the 4 channel I was using! Damn I'm having bad luck! Back in the late 80's and early 90's Alpine amps were really nice for mids and highs when using an Alpine head unit. I don't know if this is the case now.