Alpine mra-d-550 car audio amplifier
Sorry man here's what i pulled from the internet- Crutchfield sells these:
Note: The MRA-D550 requires a compatible head unit for
setup and control, it cannot be used without one. The current list of
compatible head units includes (but is not limited to): IVA-D300,
IVA-D310, IVA-D900, IVA-D901, DVA-9860, and DVA-9965.