Bowers & Wilkins P7 over-ear headphones announced to sit at top of the line-up - photo 1Bowers & Wilkins P7 over-ear headphones announced to sit at top of the line-up - photo 2Bowers & Wilkins P7 over-ear headphones announced to sit at top of the line-up - photo 3Bowers & Wilkins P7 over-ear headphones announced to sit at top of the line-up - photo 4