I can't speak to your exact combinations, but I have something very close. I have the F7 paired with the Zu Soul Superflys and FET 10He. Sound-stage is huge, micro-detail is through the roof, bass response is excellent and good upper frequency extension. Amplifier fleshes out individual instruments and performers on the stage with ease. Quality live recordings sound like your in the 2nd row. Poor quality recordings really sound like crap. The F7 with the Zu's really shine, substantially better than the F5 or F6 I also own. The F7 is a fantastic amp for money!
First Watt J2 or F7 for my Omens
I have decided to pull the trigger on either a First Watt J2 or F7. Has anyone compared/heard these two amps with Zu Omen speakers? There is not a local dealer for these amps within 250 miles.. I understand the J2 has balanced inputs, 25 watts in 8 ohm and 13 into 4 ohm. The F7 does not have balanced inputs and is 20 watts at 8 ohms and 30 watts at 4 ohms. Any constructive comments appreciated!