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RE: Is there any real benifit sonically between class A, AB etc...

Go and listen and find out. It took me four minutes listening to SET amp utterly trounce ever SS amp I had ever heard - and I have heard an awful lot of $50,000US+ SS amps. Class A no feedback Single Ended Triode. Since then I still have yet to hear a SS or Class D or tripath or or or that has sounded better. BUT with appropriately easy to drive speakers. All this gets chucked out the window when a tough to drive speaker is applied - that's why it's always a generalized statement within the parameters of the system.

Class A no global feedback SS amplifiers such as the Sugden A21a can certainly sound better than certain class A/B push pull tube amplifiers. The Sugden is one of the only truly nice sounding SS amplifiers available regardless of price. There is a reason it is the longest selling SS amplifier in history and continues to sell 45+ years later - next year I believe marks its 49th or 50th anniversary. But the Sugden is basically a SET amp without tubes. Single Ended "Topology" (SET).



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