I would say the most important spec is weight within a given amp type. The amp with the best power supply and running the most in class A always sounds better and controls the speakers better imho. This means larger transformers, filter caps, and heat sinks.
Amplifier specs, does they matter?
For solid state designs, the manufacturers boast about their signal to noise ratios, total harmonic distortions, slew rates, frequency responses, and many others. Meanwhile, the makers of the tube amps praise the liquidity and musicality of their designs. Obviously, amplifiers with tubes don't measure nearly as well as solid state amps. So, do any of these specifications really matter?
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Kijanki, you appear to have taken a stronger position against use of NF than in the past where you argued results were very implementation specific. Or are you just pointing out pros and cons, which all approaches always have? Based on a stated 100X improvement with NF, negative effects would have to be quite significant to eliminate that completely. The "its all implementation specific" argument still seems to ring true to me based on what I see, read and hear. |
Nelson Pass published an excellent article on distortion and feedback: http://firstwatt.com/pdf/art_dist_fdbk.pdf The bottom line is it does not seem to be implementation specific. About 50 years earlier, Norman Crowhurst had some similar comments on feedback and showed that harmonics can be added up to the 81st harmonics, with attendant intermodulations at the point of feedback (the feedback node). This document is an excellent read: http://www.pmillett.com/tubebooks/Books/crowhurst_basic_3.pdf |
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