In Reply to: RE: Friend of mine is looking for an ARC SP3... posted by rockdoc on April 18, 2016 at 16:02:35:
RD
Tone switching is where they don't use potentiometers for bass and treble but what they do use is an actual multi-position switch. Across each one of these switch positions,they have a resistor/cap combo,so this more or less couples those parts of circuit as if you had just a single resistor/cap combo like preamps today with no tone controls.This type of circuit is said to greatly reduce or eliminate phase shift that tone controls typically cause.It allows you to increase amplitude of the bass or treble region by switching to a different resistor/cap combo.
I'm pretty your 7T uses tone switching..If the bass and treble pots go click when you turn them,it is a tone switching circuit.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 04/18/16
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Follow Ups
- what is "tone switching", and does the 7T use it as well? - Michael Samra 19:13:17 04/18/16 (1)
- RE: what is "tone switching", and does the 7T use it as well? - Crazy Dave 08:24:25 04/19/16 (0)