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+--- Thread: U610 circuit differences & tube choices (/showthread.php?tid=36790)
U610 circuit differences & tube choices - SynthWizard - 06-16-2022
U610 circuit differences & tube choices
So I'm aware the older units used a more vintage tube and that many or most people seem to prefer...
https://gearspace.com/board/so-much-gear-so-little-time/1382442-u610-circuit-differences-amp-tube-choices-new-post.html