P5 is the mid-sized speaker in the P Series - 9% smaller than the P6 and 33% larger than the P4. All P Series speakers share the same width - a slim 200mm. ● The key point of difference in the P5 is the lower bass drive unit, also present in the P6 but not the P4. It is in fact an extra bass-only drive unit; a 165mm dia Cobex® unit housed in its own separate reflex cavity within the cabinet. ● The unusual thing about this unit is that the B&W engineers have deliberately taken the decision to select a lower bass drive unit which has different characteristics to the Kevlar® bass/midrange unit. This brings an extra degree of freedom to tailor the low-frequency response for the best possible combination of accuracy and extension which would not normally be possible T echnical highlights Kevlar®: B&W developed and patented the method of using Kevlar® for loudspeaker cones to reduce unwanted standing waves. DuPont originally created Kevlar® for use in bulletproof vests.