Class D vs Class A

Jdec, on the contrary, pardon my less than qualified attempt at explaining star grounding.

Essentially, everything gets plugged into a single power source, such as a power strip, sharing a single ground.

As switching amplifier technology progresses we are seeing less and less of the RF and EMI issues that some early designs produced which seemed to pollute the AC line.

If you are using different legs (breakers) of an AC system to power a system simply try using only one leg.

I have Zen Adagio's, powered by Channel Islands D-200 Class D amps, Jolida fusion tube pre-amp on top. I find combo wonderful. I like the dynamic punch of class D amps and combined with the tube pre-amp (beautiful mids) sounds great to me

I am very happy now with the Nuforce Hovland combo in front of the Adagios.Eventually I'd like to get Crescendos so my amps should still drive them without a problem.I am in the process of setting up an analog rig,I just picked up a Ultimate upgraded Thorens TD126 mk11 with 103R Denon.That should hold me til I get the big Zens.Will keep listening and posting.

I'm getting incredible musicality with a TRL 6SN7 preamp in front of NuForce Ref9 V2SE.

I have been using a very nicely modified Sumo Nine for the past several years. It is pure Class A factory rated @ 60 to 8 & 120 to 4. Actual after mods it does 90 to 8 & 165 to 4 never leaving Class A. It is driving 4 ohm speakers. I use a Coda CL Preamp. Yesterday I received Abletec Modules, I need to do some testing and am planning to mod those best that I can, so it will be a month or so, but if there is an interest, I'll report the results.
Tim