Oof, just lost my reply. And with it all the quotes that I painstakingly typed in from the brochures to my statement that …
The Nak system was marketed for serious audiophiles and with the addition of the 610 control amp was for live recording at home. It was not for PA. At least that's what all the promotional literature and all the reviews I have say about it.
On to my questions:
1. I get a hum when I disconnect all the speakers from the amplifier (it's tied to the 610). Must be a ground loop that making the amp live creates. Any thoughts?
2. I have Proac Tablette Signature 8s. Would replacing my 630 preamp/tuner with another 620 in bridged mode deliver yet better sound? Speakers are rated 10-100W, 8 ohms. It wouldn't look as cool of course and I'd lose the FM tuner, which I don't use enough as it is (I know, I need to hook it up to an antenna).