A while back, atltv asked me what sort of arrangements I'd made for sound in the Phantom. Sorry for the late reply, but I got around to taking pictures of the setup, only now.
The system includes a Pioneer MVH-P8300BT head unit (SD Card, USB, iPod ready, DivX capable, tuner) which has been routed through a Solid Gold amplifier to four speakers. Two speakers (Kenwood, 850 watts each) are 3 channel ones (woofer, midrange and tweeter) for extra bass...that have been fitted to a soundbox that sits below the rear seats. The other two speakers (Pioneer, 800 watts each) are 4 way speakers (additional supertweeter) which have been mounted to a soundbox which also serves as an armrest between the front seats.
The sound is certainly enough to be heard over the roar of the exhaust, and the roof mounted 'heads-up' position of the player makes for easy adjustments (although the wireless remote is easier, for this). The amplifier sits under the front driver's seat...so all in all the entire affair is quite unobtrusive. I'd intentionally opted for something that dispenses with the need for a CD / DVD player, since such devices tend to skip while negotiating harsh terrain. On the other hand the combination of the USB (I use a 32 Gigabyte one) with an SD Card (a 4 Gigabyte one) is more than enough to store all of my digital music library.
The system is also Bluetooth ready, which (with an installed additional mic) allows you to operate phones, hands-free, and use the music library from any configured bluetooth device. All of this, of course, is subject to anyone actually getting to hear you over wind noise, tyre noise, and exhaust noise.
Pictures.
