A Sumo Polaris would be an interesting comparison to a Pass! Designed by James Bongiorno. 120 wpc A/B. His amps emphasised beauty over a stark, clinical sound! I have an Andromeda, along with two older Sons.
@redwoodaudio Ya know, the XA ".8" amps sound different from the older X ".5" version amps, and a little different again up and down the range. Or, some variations in FirstWatt or even older Threshold. Depends on what speakers you have too, right?
What type of change in sound are you looking for, if you have an idea...What's missing or what are you wanting more or less of in sound?
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