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I have a pair of Bose 901 series 3 from ~1974. They are in great shape, although I need to test them.

I’m a Sonos user for all my running audio around the house.  My plan to utilize the Bose would be to use a Sonos Port for the incoming signal, run the output thru the Bose equalizer, and then get a suitable amplifier to power the Bose speakers with the signal out of the equalizer.

I’m drawing a conclusion that I can’t use the equalizer to adjust the signal out of the Sonos AMP.

Thoughts?

The BOSE equalizer is strictly Line Level and AMP does not have a Line level In/Out -- only Line-In.


The “equalizer” for the Bose 901 series 3 is just has sliders to adjust the lows and highs (bass and treble), so you may simply need the Amp instead of the Port, and adjust the bass and treble in the Amp’s settings.

But there may be more processing going on within the EQ, so the use of the Port  >  EQ > power amp may be the way to go. 

The Bose EQ is designed for an amp like this one.