nfb to ot secondary tap w/o connected speaker?

[5Trout]

In a bassman 5f6'ish circuit, if a 2,4,8 ohm multitap ot is used, does it work to
connect the nfb 56k resistor to a tap that doesn't have a speaker
connected to it.
For example nfb to 2 ohm tap and speaker to 8 ohm tap?

[Don Moose]

Assuming all the taps have a common (-) wire, go right ahead and do that.
If you have to do things with multiple wires to select an output impedance, it gets a little more complicated - in that case, I would tap the NFB from the 8-ohm (or whatever you're gonna use) tap and (be prepared to) scale the resistors that feed it to the PI.

Hope this helps!

[Enzo]

The signal voltage is present at the tap whether there is a speaker connected there or not. So the NFB will happen regardless.

[Earl]

Yes, I think that typically, the amp's NFB is 'scaled' to a single tap..in the mutli-tap configuration.

Pick yer tap, and use that voltage for the resistor ratios.

[5Trout]

Thanks for the answers.
I thought there must be some amps that have speaker impedance selector
switches and nfb, but I ask the guys how knows instead of checking 100
schematics on the net
Honestly I thought a connected speaker would affect the nfb circuit somehow.
But I got minimal experience with nfb amps.