So here’s the quick and dirty of my issue. This weekend I did the forscan mod to remove the factory eq and turn the speaker outputs to low level. I snipped the front speaker wires and used 9 wire run to my dsp where I soldered on my rca ends. I then used 4 wires in the 9 wire to run from the amp up to the front to tap into the factory speaker harness. I also snipped the rear speaker wires because I was going to use those channels but I need another run of wire. I ran new speaker wire from my tweeters to the amp. I’m having some weird issues.

Firstly, I’m having a loss of output at my right tweeter. It’s playing but it doesn’t sound like it’s getting the full signal. I also found that my Pionner Champion series amps don’t immediately turn on and off with the dsp when I turn off the truck when the rcas are plugged in. I remove the rcas from the dsp and they cut on and off as expected.

I have rma’d my Dayton dsp and ordered another to see if that’s part of the issue. I also got a better quality speaker level to rca converter which should be here Thursday. I’ve swapped right and left inputs and outputs of the dsp but the issue remains only with the right tweet. I haven’t yet tried connecting directly to one of the amps yet though. Any idea wth is going on??

I only swapped left and right, not rcas. I only have the one pair of converted rcas coming into the amp. I’ll try swapping positive and negative to see if the polarity is reversed.

Maybe I’ll pull the head unit out tomorrow and check where I spliced into the factory speaker wires for my rcas. I did use solder there. I swapped in a new dsp and got the same issue so I know it’s not the dsp. It’s something in the wiring. If all else fails, I’ll undo the low level forscan mod and try high level inputs.

This afternoon I switched from the speaker to rca adapters that came with the amp, to a good set of Rockford ones. This made no difference so I’ll pull the head unit tomorrow. Not sure if it makes a difference but I tapped the speaker wires at the back of the head unit via 9 wire and converter to male rca ends at the processor. I assume most convert to female rca at the headunit and run rca to the back. Again, not sure if this makes any difference.

So today I bypassed the 9 wire I used to run to the rca adapter and spliced in a new set of rca ends with some extra wire I had. Same issue. Seems like there is something wrong with the speaker to rca level conversion in forscan. Theres a weird ground issue because if I slide the rca out so the ground shield on the rca isn’t touching the input of the dsp, the bass and volume jump up. It’s like the wire isn’t getting grounded through the conversion.