What type of tone control is this?

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What type of tone control is this one?

NonInvBax.jpg

Is it some kind of non inverting Baxandall?


What about this other?

NonInvBax2.jpg
 
No, the filter components aren't in a feedback loop so both are passive (lossy) filter networks. Whether they have a particular name attached to them I can't say.
OK, I just noticed the top tone control is both passive for the treble section, and active for the bass section. The bottom example is totally passive.

Mike
 
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No, the filter components aren't in a feedback loop so both are passive (lossy) filter networks. Whether they have a particular name attached to them I can't say.
OK, I just noticed the top tone control is both passive for the treble section, and active for the bass section. The bottom example is totally passive.

Mike

Ah, ok, thanks. I thought about being passive for a second but given the type of amplifier it is, it seemed too weird to me.
Any idea of why would they do that? Both have LM3886 amplifier chips on them.
 
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