Slim, You wrote, "Tubes, which I have lived with for decades in various Amateur radio and
military transmitters and receivers are fine, but they have huge
variables and matching them is key. They are colored in terms of how
they perform and to me that is a distortion product. Plus they change in
performance with use; internal component breakdown and loss of vacuum
over time; in other words they have a limited life span. Its a very old
technology which was replaced by solid state for a reason and SS has
only gotten better over time and tubes are ’dated’ in my opinion with
limited supplies."
I guess you prefer SS, which is fine, but your paragraph is fraught with problems for me. (1) If your exposure to "tubes" is via amateur radio and military transmitters and receivers, then you are not qualified to comment on modern audio components that use tubes as active devices. The military did away with tubes probably as long ago as the late 1950s, and their interest was never in accurate reproduction of music. (2) I agree that tube amplifiers that use output coupling transformers can be "colored", but there is good science to suggest that the colorations are due to the output transformer limitations, not inherently to "tubes". To my ears, modern well designed tube preamplifiers and phono stages or hybrid tube/transistor circuits are often superior to solid state in conveying the nuances of what live music sounds like to me, but that is only my opinion. It is shared by many. (3) Tubes do age but they do not "lose vacuum over time", unless they are physically severely abused, like with a baseball bat. The aging of a tube can be quantified in terms of its transconductance at any point in time. Matching is not so difficult to do and also not so important for ultimate fidelity, in my experience. I don't mind changing preamplifier tubes every 4-5 years or more. (4) Tubes were indeed replaced by solid state "for a reason", but the reason was not because designers were searching for greater fidelity to the source. Lower cost of SS, the drive for ever higher power amplifiers to drive ever less efficient speakers (again, this had to do with amplifiers, not phono stages or preamplifiers), and a race for ever better specifications in regard to THD had most to do with it, in my opinion. I respect your preferences, but if you want to claim SS is categorically superior, I would take exception to that.