Speaker selector / level equalizer?

[johngalt47]

I want to build a speaker selector to do some A/B testing. Since no two speakers have the same output level for the same input, I figure the selector needs to be capable of equalizing the levels to the different speakers.

I figure I can use some op-amps and have a "volume" control on the feedback to adjust the levels. Does this make sense or am I being too simplistic?

[sreten]

Hi,

Only way to adjust gain is via a microphone measuring levels at say 1KHz,
it just seems easier to manually adjust this and leave it at that. It can
be done by controlling an analogue or digital attenuator automatically.

You can't simply have a feedback loop, that will flatten speaker response.

You can average sensitivity over a wider range, automatically that is
getting more complicated. I'd suggest two volume pots with a switch,
set the levels the same by ear and link to the speaker A/B switching.

rgds, sreten.