Much as I adore my B&W P5 headphones (recently upgraded to the wireless model), I must admit that even I would think twice about buying the company’s latest top-end model: the P9 Signature. These over-ear wired headphones cost a cool $900, but they do come with one extra: register them on B&W’s website and the company will send you a Lightning upgrade early next year.

The Lightning upgrade will of course include a digital-to-analog converter, and being a B&W one, it should prove impressive.

In the meantime, you get what B&W says is a celebration of its fifty years of audio experience.

Engineered by the same team responsible for the class-leading 800 D3 loudspeaker, P9 Signature is Bowers & Wilkins’ largest over-ear headphone and exemplifies all of the acoustic and design innovation amassed during its 50-year journey.

Part of this crystal-clear listening experience is created through the innovative placement of the transducer, which is positioned to provide a more natural listening experience. The wearer hears sound as if they are listening to a pair of stereo speakers rather than headphones, with a sense of imaging, depth, and clarity that is truly breathtaking.

They feature two 40mm full range drivers with a frequency range of 2Hz to 30kHz. Both headband and ear cups are made from Italian Safiano leather. The P9s fold for travel, and come with a carrying case also finished with the same leather.

I’ll be braving a review, sincerely hoping I don’t want to keep them. If you want to invest in a more affordable pair, the company’s P5s are available from $200 for wired and $240 in wireless form if you opt for recertified models direct from B&W.

The P9 Signatures are available for pre-order from today, and ship on October 17.

You can follow on Twitter or join our Facebook page to keep yourself updated on all the latest from Apple and the Web.