Magfan,
I believe Jeff Rowland did fine job with ASP modules but his main achievment was development of very high quality of switching power supplies with Power factor Correction, PFC - making this power supplies highly regulated. It was done in his "312" amp. Interestingly, Spectron uses switching power supplies with PFC in their pro audio amps but in their hi-fi amp, Musiican III they use traditional transformer based power supplies
The rest just (IMO) grabbed ASP, placed into their chassis, put their label (the best added their midor mods) and sold.
Bel Canto Ref 100 MkII has added battery of electrolitic capacitors improving power supply.
H2O uses (like Spectron) traditional power supply with B&O which improve sound.
However, my post was specific for this thread dedicated to the titans of 1980's - Krell and Mark Levinson - now 30 years later new geberation of class A and class D (and others) amplifier are available. not cheaper, as a rule, but...better in sound.
I believe Jeff Rowland did fine job with ASP modules but his main achievment was development of very high quality of switching power supplies with Power factor Correction, PFC - making this power supplies highly regulated. It was done in his "312" amp. Interestingly, Spectron uses switching power supplies with PFC in their pro audio amps but in their hi-fi amp, Musiican III they use traditional transformer based power supplies
The rest just (IMO) grabbed ASP, placed into their chassis, put their label (the best added their midor mods) and sold.
Bel Canto Ref 100 MkII has added battery of electrolitic capacitors improving power supply.
H2O uses (like Spectron) traditional power supply with B&O which improve sound.
However, my post was specific for this thread dedicated to the titans of 1980's - Krell and Mark Levinson - now 30 years later new geberation of class A and class D (and others) amplifier are available. not cheaper, as a rule, but...better in sound.