Well sort of DIY I have just replaced the drive unit's in an old pair of Kenwood rear channel speakers with some Pioneer TSE1390 car speakers to use in my bedroom. Nobody on these forums wanted to buy them off me and i was bored this evening, so decided to do the swap for the hell of it. (might as well make use of them if i can't sell them) They actually sound prety good, better in fact than the full size Kenwoods that are in our living room. I was just wondering if i could improve the bass by porting them at the rear and purchasing some mini flowport's, or lining the inside with foam. They sound bassy enough already but as they are currently in a sealed enclosure the driver is not moving as much as when they were in my car. And before anyone says that i will burn out the voicecoil by running 4ohm speakers off an 8ohm amp, I KNOW. I could't even sell them for £20 so it was either do this or throw them out as otherwise they were completely useless to me. Cheers, Andy.