I have a customer that has similar De Havilland Aries 845 mono's and Newform Research NHB speakers and is doing a as we speak review with them using my passive. I will let you know when he's posted it.
I had a friends inexpensive passive and I tried it tonight. It has more detail and matches up quite well with my amp.
I looked inside and it's just a couple wires running from the input and output to the volume and selector.
It does have 3 but I only need to 1 for my Lampizator lite 7 and my phono pre.
This is the first amp that I have had that works so well with a passive before it lacked dynamics but with this amp they are there maybe not as much but it almost sounds more natural.
What's your website? Thanks, Scott
I can't PM you as your private here, but you can reach me via email in the second pic and the website at the bottom via this link, on DIY your own.