I am now sufficiently interested to look deeper at this; I originally went for the open speaker approach based on Doug's descriptions and experiences, and yes, when I tried it, it appeared to make a difference. It was also due to the fact that there are no real locations inside the cabin of a Mini to place an enclosed bass unit of sufficient volume.

I've seen a product which takes advantage of one of those 'unused' spaces in a car - beneath the front seats. I can't remember what its called, but it functions basically as an enclosed speaker transmitting (pretty much) directly into your - spinal column.

What I don't know is anything more than the manufacturer's hype - like whether they actually work, or whether they're too big to fit under the seats of a Mini, or whether they just give thump and no tones.

All questions for someone else.

Save the whales. Feed the hungry. Free the mallocs.