F7 owners what are you using as preamps? I have used Pass B-1 (wanted to hear the F7 in its pure state with a passive), then a Manley Shrimp tube pre (has low output impedance so it is a good match), which I liked better for bass response, but my favorite is my newly acquired Wyred 4 Sound STP-SE with stage 2 upgrades, a buffer at lower volumes like the B-1 but with added clarity and drive to my ears - now I think I am hearing the F7 as it is meant to be! Speakers are Devore Gibbon super 8's. You will love your new F7! I have had mine for over a year now, I was on Reno HiFi's waitlist...