Its an HP Pavilion Wave.
Its a multimedia desktop PC with a little speaker in the top. I doubt Bang & Olufsen touched it, they probably just got a cheque from HP to stick their name on it as usual. Looks good in the OP's pictures but the top is plastic and has a big HP logo on it.
http://store.hp.com/us/en/mdp/hp-pavilion-wave-424009--1