I have a "primitive" rig where I can perform various changes easy. I started with cheap parts, simple CLC rectifier, ordinary, "off the shelf" OPT, then I upgraded various parts. IMO - with this SE amp, the quality of almost every part is critical. The largest difference was OPT - when I changed it to "Lundahl" 1664 (IMO - the minimum quality you want to use ), much of the undesirable "old radio" sound is gone (lower distortion, larger frequency extension). Of course, this is subjective, based only on listening tests. These days I expect some other "Mundorf" capacitors and AN-Tantalum resistors...go figure
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), much of the undesirable "old radio" sound is gone (lower distortion, larger frequency extension). Of course, this is subjective, based only on listening tests.
