[goaztecs]

Mounting a subwoofer in the trunk is your key to getting away with smaller, less conspicuous speakers in the cockpit. It is the Bose AM-5 approach from the early 1990's. They proved that you can reproduce mid and high range frequesncies effectively with small speakers that have a high wattage capacity (think large magnets and voice coils). Since low frequencies (bass) are non-directional sounds, the sub-woofer can be housed almost anywhere. Just like your home theater in your home, where your subwoofer is hidden behind the couch or under an end table.

If you can get a good sub mounted in the trunk (leave room for a weekender bag for you and your main squeeze) you should be able able to generate good, distortion-free, sound in the cockpit with some properly located (and properly amplified) small-sized speakers in the cockpit.