slicetwo

I have a 2014 Subaru Outback. My system is a Pioneer NEX4200 going RCA into an Alpine KTP-445U dash amp. The amp goes to my Alpine SPS-610C speakers in the front and Alpine SPS-610 in the back. I also have the Alpine PWE-S8 under-seat subwoofer going directly from the head unit.

My issue is that when listening to mostly rock and metal songs, when there is a lull and it's just distorted guitar (either chords or leads), there is a noticeable fuzz that I never hear on ANY other speakers (both pro-audio speakers and regular computer speakers).

We tried bypassing the amp and it still happens (and the overall sound is worse), high passing the speakers at 100hz, re-grounding the power for the amp, another HP crossover for the tweeters, another tweeter, and rebalancing the gain structure between the head unit and amp.

We know the speakers aren't blown as it happens from all the channels, and it's only with certain kinds of music. It makes absolutely no sense and we're both dumbfounded.

Some redditors suggested that the amp may be to blame, and another suggested resonance. The amp seems to make more sense in terms of quality, and my experience with resonance in a studio setting makes me think that that is not the issue.


Does anyone have ANY ideas on what could be going on? It's driving me absolutely crazy.


Thanks!

sloride

Did you bridge the head unit that is pushing the sub?

I tried that in my boat setup and it made everything sound crappy

slicetwo

I don't believe so. The sub has its own amp and is being run right off the head unit.