I have B&W CM9 S2, at first i powered them with a Denon receiver and it sounded good, i then upgraded to an old Rotel integrated (BX900?) and the difference was HUGE, the control over the bass and punch was night and day.
I later upgraded to a Classe CAP-151 and the improvement was also significant but in a different way, much improved sound stage. The Classe was older and required a Recapp but it got a good deal on it so it was worth the repair to have years of trouble free service.
I later upgraded to a Classe CAP-151 and the improvement was also significant but in a different way, much improved sound stage. The Classe was older and required a Recapp but it got a good deal on it so it was worth the repair to have years of trouble free service.