Bad RCA output?

[djazmatic 10+ year member]

So, Just recently I installed an amp/sub into my car. I have them running off of a JVC KW-AVX810 that I bought brand new from sonicelectronix.

Whenever I turn up the gain on my amp to where the sub is barely coming to life, it shortly after starts booming out of control, like it'll just go from working fine at low volume, to a full volume non stop boom that has nothing to do with the music. If I turn it all the way down it goes away, but If I try to adjust it back up again, the same thing would happen, burst into a out of control boom.

However, when I have the sub connected to the Front or Rear RCA outputs from the deck...everything works 100% fine. The sub only goes out of control when connected to the Sub RCA output. Anyone have an idea what the problem could be? defected outputs maybe? If anyone knows a possible fix to this problem, let me know.

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[djazmatic 10+ year member]

Btw, I'm not sure if this makes any difference but I ran the single Sub RCA output to a Y splitter and then the stereo cable into the amp. Could this someway be causing this? I don't think it could, but I figure I'd mention it just in case.

 

[djazmatic 10+ year member]

Bump.

 

[djazmatic 10+ year member]

anyone?

 

[djazmatic 10+ year member]

Bump!

 

[djazmatic 10+ year member]

..another bump.

 

[djazmatic 10+ year member]

..another bump.

 

[djazmatic 10+ year member]

bump num. 9999