After 25 years in audio and owning several JRDG amps (I use 2 7s, 2 1s and 2 3s in an active triamp config) I can confidently say that although switched mode power supplies can sound "faster", as the say in car terms - "there is no replacement for displacement" - the power supply is everything. Big toroids give you more slam in the bottom and sound much more musical. I tried Linn Klimaxes (switched mode power supplies)in my system and they didnt even come close to the Rowlands. I wouldn't trade them for anything.
