Apparently, my stock (non-ML) amp is kaput (ye olde popping sound in speakers, no audio, no BT to phone, but headend NAV and audio dials still function).

I have searched everywhere, and can not find this answer— can the stock amp be replaced (professionally, I prefer to let someone qualified break things) with some new aftermarket amp other than the OEM Pioneer amp, while retaining all of the stock functions. I presume the aftermarket needs to be compatible with the 2 ohm speakers, as well as requiring some sort of wiring harness.

TIA.