Bywynne:
If you have the opportunity, try to get a darTZeel, Ayre, Rowland 625, or no-feedback triode tube amp into your system to compare to your ARC. There are indeed a lot of different factors that affect amplifier performance, but some are more important than others and global feedback is now known to be genuinely harmful to natural sound. The vast majority of designers still use it, however, because it's quite difficult to make a circuit stable, particularly a high-powered amp circuit, without global feedback, and most people buying amps don't know the difference.
Last month, I spent four nights in a row with a good friend and his all-Audio Research system, including VTM 200 monoblocks, plus big Wilsons in his large, purpose-built two-channel room. He recently demo'd a darTZeel and a new darTZeel is now on the way to him. 12 db. of global feedback is a lot, but even 2 db. changes the presentation - the difference is not subtle.
If you have the opportunity, try to get a darTZeel, Ayre, Rowland 625, or no-feedback triode tube amp into your system to compare to your ARC. There are indeed a lot of different factors that affect amplifier performance, but some are more important than others and global feedback is now known to be genuinely harmful to natural sound. The vast majority of designers still use it, however, because it's quite difficult to make a circuit stable, particularly a high-powered amp circuit, without global feedback, and most people buying amps don't know the difference.
Last month, I spent four nights in a row with a good friend and his all-Audio Research system, including VTM 200 monoblocks, plus big Wilsons in his large, purpose-built two-channel room. He recently demo'd a darTZeel and a new darTZeel is now on the way to him. 12 db. of global feedback is a lot, but even 2 db. changes the presentation - the difference is not subtle.