I was at my local second hand store and saw a pair of bookshelf B&W 601's. Didn't hesitate seeing as the price was $2.99 each and they were in flawless condition. I figured one of them might of been bad or they had a problem, sure enough woofers on both are shot. I currently have a klipsch r3 set (rf3, rc3, ksw 12) and an outlaw audio 1050 receiver. I was thinking these might work as nice surrounds, however my dilemma is I need to replace the woofers. So in a wrap up I'm looking to find some woofers that would work in these 601s in the $75-$150 range. The reason I say I'm pretty sure they are S1s is because there is no marking on the back indicating which one is which. Thanks in advance.