Actually iirc they mount them deep within the engine bay, usually near the alternatormost likely inside the vehicle.
hmmm i thought it may be one of those new amps that are inside the tire and create a cyclone out of the electrical signal adding about 15 db's.most likely inside the vehicle.
well there is a tiny black box under the passenger seat but i was thinking it is a power supply for the heated seats or something. its only about the size of a cell phone and we are talking about a 4ch 450watt amp, so i don't think that's it.under passenger seat in 3g, not sure about 4g
or behind his italian chip.If it's the infinity system, it's underneath the passenger seat.