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-   -   Amp overheating? (https://montecarloforum.com/forum/interior-audio-visual-electronics-11/amp-overheating-28124/)

Boxman420 05-11-2011 02:49 PM

jaws: thats a great system for sure! mine is a little lower then that due to i have

HU. Ida-x303
6.5s Type S
6x9 type S
12in Type S
and soon to be Mrp-M500

Milhouse 05-11-2011 03:30 PM


Originally Posted by Boxman420 (Post 324037)
here is my amp its a boss riot R435, 2ch. i have it hooked to an alpine 12in sub SWS-1242D. dual voice coil. and here is how i wired it exactly. this is also how it showed in the alpine manual that i got for the sub.

http://a248.e.akamai.net/pix.crutchf...ch-low-imp.jpg

Did u read the warning in the lower right hand corner of that picture? This is exactly what I thought the problem was, ur impedance is too low. Follow me.......that amp is 2 ohm stable but only when run in stereo, when u bridge it, its then running mono and the impedance is now split in half between both channels so your single 2 ohm load is now 2 1ohm loads.....ur amp is not 1ohm stable so its overheating and shutting off cause it can't handle it.

Just to confirm that is indeed the problem, run each coil from the sub to its own channel on the amp, reset ur gain, and bump it like u did before. As long as there is no permanent internal damage to the amp, you'll see that it no longer gets sizzling hot and won't cut off anymore either. My suggestion, get a new 1ch amp that does at least ur subs rms at 2 ohms

7801MonteMan 05-11-2011 05:45 PM

I had a similar issue with my Infinity amp a few years ago and my issue was that it would get hot and then it would go into protection. And then when it would cool down I could turn it back on and everything was fine until it got hot again. My issue was that I had a back ground wierd issue but it fixed the problem and I haven't had this issue since. So it might be something to look into maybe. Just for the heck of it.

Milhouse 05-12-2011 12:12 AM

Yeah, that's a possibility too. But even if that is partially to blame, his amp still isn't 2ohm stable when bridged so that has to be addressed regardless.

Boxman420 05-12-2011 11:36 PM

millhouse thank you for pointing that out. i was a little weary of wiring it myself. as it was my first time ever wiring an amp and a sub. i just followed the directions. but i still think im going to upgrade to the alpine M500 regardless. i was also thinking of running it at 8ohms. but i dont want to loose so much power.
I went out and drove around and it overheated and i checked all the wires making sure none of them where hot and checked the ground multiple times and everything is good.

Milhouse 05-13-2011 01:48 PM


Originally Posted by Boxman420 (Post 324364)
millhouse thank you for pointing that out. i was a little weary of wiring it myself. as it was my first time ever wiring an amp and a sub. i just followed the directions. but i still think im going to upgrade to the alpine M500 regardless. i was also thinking of running it at 8ohms. but i dont want to loose so much power.
I went out and drove around and it overheated and i checked all the wires making sure none of them where hot and checked the ground multiple times and everything is good.

Don't run it at 8 ohms, too much resistance! Run it so that the pos and neg of each voice coil are wired to its own channel on the amp, aka 4 ohm stereo.


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