cm8CM8 is a combination of CM6 and CM1, where racers start with CM6 and finish with CM1 within 28 hours. Learn the rules, awards and cut-offs of CM8 and CM7, the similar category of CM8.Full Bowers & Wilkins (B&W) CM8 specifications. The CM8 is an elegantly proportioned, slimmed down version of the award-winning CM9. A true three-way loudspeaker