Cary CAD-280SA V12 power amplifier
According to Cary Audio designer <A HREF="http://www.stereophile.com/interviews/399">Dennis Had</A> in this amplifier's documentation, "Countless hours were spent designing and voicing the CAD-280SA V12 stereo amplifier...It delivers high performance in a combination of class-A single-ended triode and true balanced push-pull technology."