I'm currently running a Rockford Fosgate PBR300X2 behind my rear parcel shelf to power two 6x9s back there. I'm thinking of getting a DMC-CA subwoofer box, bridging this amp to power it, and buying a PBR300X4 to power my 6x9s and my front 3.5"s (currently powered by the head unit). The PBR300X2 at 2x4Ohms is actually 100W RMS per channel, while the PBR300X4 at 4x4Ohms is 75W RMS per channel, so this seems like it should be fine to me. (My 6x9s are 75W RMS and the 3.5"s are 30W RMS -- and I'm not a loud listener.)
These two amps are exactly the same physical size. Has anyone tried to hide a PBR amp behind the glove box? There's a gap in there that seems like it would be just about right. Not much airflow back there I'm sure, but there can't be much airflow between my rear parcel panel and the pontoon, either.
I could also imagine just attaching the amp to the bottom of the glovebox itself, although even with strong double-sided tape I'd be worried about it getting kicked.