Parasound HCA2200II or HCA3500 safe with SDAs?
I'd like to upgrade the Parasound HCA2003 (200w/ch @ 8 ohms) amplifier currently feeding my SDA-1Cs. I have Parasound amps for all my channels (HCA1500As for my side and surround back channels) and I'd like to stick with Parasound.
I was considering buying an HCA2200II (220w/ch @ 8 ohms) or a HCA3500 (350w/ch @ 8 ohms) on the used market, but I'm concerned that they might not have a common ground design that is compatible with SDAs.
The owner's manuals don't say much, but they state that the amps are dual-mono which may present a problem.
Dual mono circuit topology for superior separation past 20kHz
(It has one power cord.)
Each channel of the amplifier has its own power supply including an independent 1.4 kVA toroidal power transformer and 97,600 uF of filter capacitance. This dual-mono configuration provides the high levels of power needed for some of today’s more sophisticated speaker systems. (It has two power cords.)
Does anyone know whether these amps are incompatible with SDAs?
Non-Common Ground Amp Fix
When making an inquiry to a manufacturer about whether a particular amp is common ground or not, you should also ask if the grounds of the two channels (or the grounds of the two amps, in the case of monoblocks) can be strapped together with a piece of wire if the amp is not a common ground design.
With Adcom's non-common ground amps, all you had to do was connect a piece of heavy gauge wire between the negative negative binding posts. With Adcom's monoblock amps, all you had to do was connect a piece of heavy guage wire between the negative binding posts of the two amps.