ptmarkley

I have talked to multiple car audio shops and not much help was given. So here is the scoop:

I have a 2015 honda accord ex-l coupe. I replaced all the speakers including the subwoofer and added a 4 channel amp and a mono amp. This was professionally installed.

Day 1: Everything was fine, sounded fantastic
Day 2: Noise started.

The noise: Constant sound, doesn't go up or down on volume, or if engine is running or not. Noise is still there even if HU is turned off (HU is stock).

The install: The install is HU>Amp>Speakers. My HU apparently puts out a clean full range signal and has low level inputs so the installers cut the ends off RCA cables, spliced them into the outputs that were originally going to the factory amp. On the accord forums, this is what most people did and worked. No need for LOC and the factory amp is bypassed.

The equipment: Originally had a 4 channel kenwood amp, the sound was a distinct pop-pop-pop-pop-pop sound. Switched it out to a kicker amp in hopes it would fix it and now its just a white noise type of sound. The RCA's seem to be cheap (not shielded)

The noise is out of ALL speakers, ive unplugged each RCA one by one, only stops sound to the correlated speaker.

What the shop tells me: The HU sending out a signal and i need a $600 sound processor to unEQ the signal. Other audio shops said doubtful, thats BS but they had no idea either. Keep in mind: it was working day 1 then stopped. Other accord members say signal is clean and no need to unEQ or add a sound processor.

Please help. Thanks