Just thought I'd post a modification to show an option to improve the sound of the Bose system on the 370Z and liberate some valuable boot space at the same time. Since there's no spare or space saver in the UK, the boot space below the carpet is filled with polystyrene and a rather feeble plastic Bose subwoofer that in other markets sits within the spare wheel. There's virtually no sound proofing of the body shell in the boot space which doesn't help with the tyre roar from the OEM Bridgestones. I've removed all the polystyrene spacer material (it just lays on the boot floor) and the Bose subwoofer. I've had the entire space sound proofed, and then a 200W RMS JL Audio amplifier and 10" JL Audio subwoofer fitted in a custom MDF & resin lined enclosure. There is a space to hold the compressor and associated bits for optimistic roadside puncture repair opportunities out of sight. The whole thing is carpeted in black and a metal grill protects the speaker cone. The original plastic boot floor and carpets then lay over the whole thing to give a completely standard look when the extra space isn't required. The work was carried out by Absolute Audio in Amesbury, Wiltshire. It's very high quality work with no modifications to the car - everything can easily be returned to standard if required. Highly recommended if you are looking for some decent bass lines. Nice side benefits are reduced road noise from the rear and extra space for those longer road trips.