07 JBL system fuckery

Hey guys, I have been driving with my radio off for a year and I am sick of the wife's singing. I have spent $1,200 at a car audio shop and they can't solve this problem. I've been through 3 decks, 3 different phones, and 2 maestro interfaces with no luck. Maybe one of you slick geniuses can solve the mystery!

Truck: 07 Tacoma Sport, Crew Cab, Manual, with JBL stock system minus the deck.

Phone: Iphone 12 pro

Deck: JVC KD-X270BT

Integration Interface: Maestro

Outcome: I want to listen to music through bluetooth

Problem: My phone connects and stays connected but usually 1 minute into startup the music skips the way an old scratched CD would skip and it keeps skipping forever. Nothing seems to fix the issue. The radio works fine but I live in mountains so I get next to no signal. Same thing happens when I plug the phone in using a USB cord.

Do you guys have any idea what the fix would be? Try a PAC AmpPro? Replace the amplifier?

I am out of my element here and could use the collective minds help!

 

The deck/Maestro is sending just data to the amp. The amp does all the heavy lifting/audio processing. My bet is the amp is on the way out.

Lose the JBL amp, go from the JVC to a nice 5-channel amp. Problem is the JBL speakers are 2ohm, but may not handle the power from an aftermarket amp.

Before you go dropping money here though, try this. Pull the JVC headunit and connect speaker wire to all 4 speakers. The JVC won’t like it for long, but it should tell the story. Play some tunes at a MODERATE volume, and see if the skipping starts. If no, the JBL amp is the problem. If yes, report back.

 

I messed around with a bunch of stuff and nothing worked, but then I plugged in the old JBL sub that I took out cause it was awful and everything works fine again. It must be a connection in the sub's wiring that did it.

The music starts skipping and cracking at high volume, my guess is the amp or speakers can't take it for some reason. It's loud enough for music and podcasts so that all I care about anyway