I found a solution that took the AL-III's from excellent to awesome! Audio Extreme "AudioXtrem@aol.com" (owner Rudi Blianca a well respected ribbon expert on the Speaker Builder DIY news Group)makes an active crossover that eliminates the power hungry passive crossover in the Carvers. It requires bi-amping the Carvers. The difference was quantum. With this crossover and a bi-amp configuration efficincy is advertised as at least 3 dB better. I think it was closer to 6 dB!! My amp now runs cool with little fan actuation. The bass is much much better (tighter amd more Found this on www.audioreview.com regarding the carver amazing III -perhaps this person has a crossover for the platinums- hope it helps.
mar4004
mar4004