I think my Marantz PM-10 and PM-11s2 are better products. Relative to solid state, it’s a loaded question. Whether that difference is favorable or not is a personal preference. Adding to the social interest is the fact that this was from the same company that is known as Anthem. It’s sort of impressive since the roots of the SFS-80 are in hobbyists who took the Dynaco design with expired patents and tweaked it. Relative to tubes, this in fact is the highest measuring tube amp that anyone has tested. I am not sure if you are asking relative to other tubes or relative to something like a modern solid state amp. Certainly, the new current production 300B’s from Western Electric would be interesting to measure. No matter how good your 300B setup may be, it would be nice to see if there is a sweet spot for your bias. I don’t use this tube amp in any of my primary systems but it might be interesting to see if 42 mA, 45 mA, or 47 mA ends up having the “best” results. Then you have all the hand waving that E元4’s sound better than 6550a’s if you don’t need power, but E元4’s are typically biased at 40 mA. I have always been told that higher biasing is better too, but I subjectively thought 40 mA was better but I also told myself that it was probably the bias of knowing that these tubes have a finite lifespan and have no reliable replacement.īut at least in this case, the lower bias measures better! The 6550A should easily handle even more power than 50mA. You should put your gear on the test bench too. It sounds like the power limitations are real, but with a matching high efficiency speaker or appropriate listening level, it’s supposed to be very impressive. Then the question is how good something like an Audio Research, current production amp can perform.ĭefinitely! Searching USPTO, I cannot find evidence that they ever trademarked the name and Sega has trademarked the name for their latest Sonic the Hedgehog game. From what I understand the 12ax7/12at7 combo is even better than the 6DJ8. I don’t know if this actually measures better than a MC275/MC2102.
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