"...comparisons between live and recorded music are in valid and hence unreliable. audible memory is very short."
Rarely, I have read more horses..t then this.
First, SHORT-TERM audible (or other) memory is "very" short, indeed. I took word "very" in quotation because for different people this duration will vary and should be prolonged with training.
Long term audioble memory - the memory that music critic has, that professional musicians have, the memory of recording engineers, the memory of speaker designers like vom Schweikerts and Gallo... is short???? People who work decades and decades in audio environment, environmemt where luck of attention will cost you your job or success or both? These people have....excellent audioble memory. I am NOT saying that each of these people's memory is identical -it would depend on their "internal" ear-brain systems.
Mike asked simple albeit somewhat naive question. Initial critics correctly stated, IMO, that Spectron is not the only one amp "in the desert" (actually, if you like GOOD tube amps, hate weight and hate heat then ...yes, "one in the desert", IMHO only) there are other excellent amps, both solid states and tube. Also - not that many excellent amps around (Athmasphere is one of these few - my hat off to you, sir).
I feel that Brycee has summirized it excellently:
"I can see what musicians would like about the Spectrons as they are very accurate. To each his own. Enjoy!"
So, lets enjoy music "alive" and....re-created.
All The Best
Rafael