I think no feedback may have some sonic advantage in solid state line level applications. Especially digital sources. That is what I have heard in my own home. Playing vinyl thru zero feedback power amps just doesn't cut it for several reasons. I have tried them and IMO they are not able to take the punishment, nor do they have balls. You want to play some dainty Jazz music fed from a cd player, then you can revel in the midrange purity and clarity. That's not my listening style, so they don't work for me.
