The reason I asked was to point out that it would probably make a quite acceptable line amp with gain of about 5 bypassed, and about 3 unbypassed, with a low enough output impedance either way.
So yes, quite satisfactory, probably perfectly good enough either way.
So yes, quite satisfactory, probably perfectly good enough either way.
And quite pointless to put in bypass switching, when the pot has so much more effect.
after thinking about this more I may have been off track with what the requirements would be. I am thinking about a preamp the can drive a tube amp which could use more gain vs chip amps which seem to work just fine without added gain. So maybe what I truly need Is a preamp that can have adjustable gain rather than the ability to switch from active to passive . If the gain could be reduced enough that the chip amps dont play at high volumes at a very low volume control position, that should be adequate.
What are the I/P impedances of the various amps? Other posters have given you a straight forward method. Adding a switchable bypass cap. to the 12B4 setup provided will do the job. What CCS gets used will be governed by the I/P impedance of the chip stuff.
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It sounds like you don't actually have a setup with this problem, you just think you will, based on questionable generalizations you have read. Just forget it, all you need is a preamp, if even that.
