Peculiar audio problem

[Mooselove8988]

So, I rewired the alternators to both run to the blue top first and then ran a separate charging wire to the yellow top and then tested it. My subwoofer amp is overheating still. It actually seems it might be cooking. I cant figure it out for the life of me. The wire is 4 ga stinger. Should I be running 2ga or 0ga? I dont think the inputs are even big enough for 2ga.

Then only thing I can think of now is that I should shorten my ground cable from the amp to less than 12''. I Might be able to get away with 8''.

I am prepared to call this amp a really expensive paperweight at this point although, if it is sitll salvageable I would prefer that.

I am running out of ideas here fellas.

Voltages
Truck off
Blue top-14.2v
yellow top-13.1v (The yellow top is about 2 years old. I will be replacing it soon with another Blue)

At idle
BT 14.2v
YT 13.3v
Stock alt 14.1v
Xp alt 15.2-4v

Thanks again.

 

[Mooselove8988]

Anyone have any more ideas?

 

[NoPh33rRaCiNg]

that yellowtop shouldnt be charging at 13.3 at idle... you shouldnt lose much more than .1 or .2 volts between the front and back battery...

---------- Post added at 02:14 PM ---------- Previous post was at 02:13 PM ----------

Check your grounds make sure they are barely metal. It's your 4 channel getting hot right? All your door speakers are 4 ohm speakers?

 

[Mooselove8988]

I will re surface the grounds and shorten them and then recheck the voltages. The 4 channel was going into hella protect but now, it barely does. Only when I run it at high volume for a while. The problem is that it never did that before. The monoblock is the one getting hot.

Youre thinking that the yellow top should be charging at closer to 14 like the blue top? I was throwing close to 3.5k watts at it, on a stock charging system. It has seen some abuse and it is getting a little old.

 

[NoPh33rRaCiNg]

I will re surface the grounds and shorten them and then recheck the voltages. The 4 channel was going into hella protect but now, it barely does. Only when I run it at high volume for a while. The problem is that it never did that before. The monoblock is the one getting hot.

Youre thinking that the yellow top should be charging at closer to 14 like the blue top? I was throwing close to 3.5k watts at it, on a stock charging system. It has seen some abuse and it is getting a little old.

Yea you are saying your alts are charging 14+, your batts should be very close to whats coming out of the alt. Amps normally will get hot if your running below the rated impedance, bad connections etc...

 

[Kolt-46]

Check the load on the amp. If you are running too low of an ohm load / gain too high, it will clip. I'd also check the ground as mentioned above.

 

[Mooselove8988]

I turned down the inputs on the 4 channel. I set them before using an Oscope and a test track at 10k hertz (If I remember correctly, I think it was 10k) The load to that amp runs at 14.1-3 when I have the music at 30/35 and then it goes into protect for a brief moment and then comes back on again. And I just shortened the grounds to about 15'' (down from maybe 25+) and sanded the metal with a stainless steel wire brush with my drill. It was sanded before too.

My amps are mounted under my bench seats and I cant get the grounds shorter than what they are now because the wire needs slack for the travel when the seats are lifted. I am considering mounting them on the floor and shortening the grounds again but, could it really be that big of an issue? Before I added this alt, I had zero problems and everything stayed the same. I could run both amps and have the music at full blast and the amps wouldnt even get hot.

A bit frustrating. I really appreciate the input and patience guys.