Cat - thanks for telling me about your experience - would be curious how big your gap is - always read too large a gap and your bass gets muddy, even disappears.
I have some Gaia footers that I have used on other speakers - yesterday I had set out to install these on the Supremes. I have 100 year old wood floors so speakers are a little wobbly on the wood floors - knew the Gaia's wouldn't give me the recommended gap between speakers and floor but thought it might solve the wobble. Even though there are three post options the Gaia's didn't fit on the Supremes so resorted to playing with gap and tweaking til I got a better foundation on the wood floors. Still amazed this morning at how different the speakers sound with a 6 mm gap vs 3 mm. Small change. What are other Zu owners doing with feet and the gap on their speakers?
I know this thread is mostly about amplifiers so here is what I am using.
Right now have an LTA Ultralinear integrated playing with the Supremes. Great amp but until yesterday I thought it was bass and dynamics challenged. Think I am re-evaluating that.
Also have nice combo of hot rodded Amp Camp monos and Don Sachs preamp. Better dynamics but maybe not as much detail. Plan to swap this combo in the new sounding Supremes in next day or so- curious as I thought dynamics were pretty good before tweaking the gap.
My wife smiles at me and sure she is thinking I have too much time on my hands...