Power amp / w speaker box

Here's a pic from the amp under my seat.

Read the problems I ran into if you plan on putting it there as well...

The room under the Prius seat is enormous, so it IS a quite logical solution.


Installing active sub with OEM headunit | PriusChat

 

There are speakers in the back doors, but not any further back (Not in the stock Prius, do not know about the JBL version. My Volvo V70 has tweeters in the 'D-pillar' where I *could* tap into the speakersignal).

I went for fitting a complete headunit because I wanted a subwoofer output and I wanted an AUX-input. The cavity behind the flip-down compartment under the stock radio was obviously desingned for this purpose. I doubt my JVC KD-AVX33 would have fitted (it's in the Volvo, has an oversized facia), but any bone-stock carradio will fit.
With the specialised wiringharnass, the 68ohm resistor and a little bit of guts, anyone can hook this up.

There's plenty of room in the back as well, some mount it into the side pocket. The reason for putting it under the seat were total stealth without loosing ANY storage space AND it's close to the front speakers (they are run of off the amp). I ran a standard home-audio 4-channel RCA cable (used between amplifier and cassette deck) 5ft cable and could reach the amp. No dismantling of all doorsills, just a straight run under the carpet. And a short run af 18Ga four-wire speakercable back into the stock wiring behind the radio (flat cable I also had lying around).