I know this is ancient history, but this replay just shows the childish nature of some against the audiophiles out there.
A well positioned, mounted and tuned subwoofer is an essential part of a system, as are the mids and tweets, get them right and they will improve the sound tremendously, the Multipla has a massive advantage in this area, the space in the car is exactly what is needed to do this, the underseat space is great if you want the slimline active woofers from the likes of Kenwood or Alpine .etc as they'll simply just mount to the passngers side floor, but the boot being the way it is leaves a custom build easily doable and will also leave you with useable bootspace.... with another advantage of the spare being underneath the car. As for making the roof flex... well I have a double sunroof, so no flexing there, but if it worries you then sound deadening material is available, of if you're a cheapskate, self adhesive flashing from B&Q is exactly the same but doesn't have a brand name printed on it...like you could see it anyway....Now as a comparison, I have 2 Alfa 156s, 1 with the BOSE system and one without, they both have the same headunit and both have the same Bose speakers in, though obviousy the second is without the amp and sub, and I can say the difference in certainly notable, not just the volume but with both at the same level the full Bose system is a far better sounding system, the punchy bass, the undistorted mids and distinct highs make the removal of low pitch tones from the mids well worth the effort, the same difference as if you were gaming with speakers or a headset, the message is that things are made for a reason and Subs, no matter how loud will make a massive improvement to your audio pleasure, just don't cheap out.
