One of my mates has the SPL 12" Ground Zero Nuclear running ~4000w RMS, most ridiculous bass I've experienced as he had it in a 106! It made it hard to breathe after a while because of how the bass was haha, I love bass but my current car doesn't allow me to have window shattering amounts of it though! Roj will be fine with the CBR10 till he decides he wants something a bit more.. bassy?