Speaker Feedback Inpedance Sensitive?

[jrc111]

I have a Hot Rod Deville 212 overdue for a recap, and I’d like to put a multi-tap Output XFMR in it while it’s down, to take advantage of some extension cabs I have.  In the circuit below, the gray wire is the “feedback” lead, tapped into the 4 ohm XFMR output.  Any problem leaving that as is, and putting multiple jacks: 2, 4, 8, and 16    ohms, and power off, just plug in what I’m using, and leave the feedback wire where it is?

[shooter]

leave the feedback wire where it is

[sluckey]

The feedback wire should always connect to the 4Ω output, regardless of which impedance jack you connect speakers.

[jrc111]

Thanks!  I’m going to use the same scheme for a Hoffman Princeton Reverb I’m collecting the parts for, and thought I’d try this first.

[thetragichero]

just adding this so you know the why: https://www.aikenamps.com/index.php/designing-for-global-negative-feedback

long story short, you could attach it to a different tap, but then would need to change the nfb values to achieve the same sound/response

[PRR]

..., you could attach it to a different tap, but then would need to change the nfb values ....

And since the several taps are coupled to give 99.8% the same signal (at different voltage), only rabid hi-fi fans could care. Yes, keep the same NFB tap as designed even it you put speaker on another tap.

[jrc111]

Awesome stuff.  Thx!