Thanks Igorb, Team212, and Gopher.
@Igorb, I am a little worried if Redgum amps can sound bright, especially in the upper midrange and lower treble area? My ears are pretty sensitive to this. I am surprised you said the Redgum sounds bright with ZU speakers. I have heard them before and it seems like it would take a lot to get ZU's to sound bright. They are pretty warm and full. Perhaps you just prefer the tube sound? I think tubes are the best match for the ZU's. I heard an Electrocompaniet integrated with a pair of ZU's, not the best combo, and while the sound was a bit lean it was a sound I could still live with. And I consider Electrocompaniet to be a bit bright sounding.
@ Team212,
The Redgum Sonofagum SG 5500 is the only Redgum amp that it is not made by them. They source it from China and only tweak it a little. I was looking for a Redgum made integrated amp which I am guessing sounds a bit different than that one.
@Gopher,
The Redgum now has dual remote volume control that matches the volume of each channel to within only 0.1DB of each other. You can also change each level as well. Downside is that Redgum can not use the much more expensive volume controls that they use in the non remote versions. You can also only change the source through the remote as it is then electronic switching. I prefer the reliability of the manual dual volume controls. But I just don't think I will ever be able to match the channels to within 0.1DB by ear like the remote one can.
I do wish I could try one out before I buy. I am a little surprised that it could be a bright sounding amp. I would have thought that with the MOSFET output devices and the passive preamp section that the amp would sound smooth if not slightly warm. That is more of the sound I am going for.
Any further insights on the sound quality would be greatly appreciated.
Thanks again.