Agree with Knownothing above. No comparison. I own the GFP750--there are many threads on this classic here. Check them out. But, I love it to death. The passive mode is where it is at--I am not crazy about the active mode which is a bit forward sounding to me. Also has balanced inputs and balanced outputs in a true balanced Class A hexfet in/mosfet out design. Nelson Pass design, nuff said. He is genius. As anything, it depends on your own ears and system to judge. This is the ONLY Adcom pre to consider for any decent system.
