fwiw i do feel that belles' amp voicing is a little on the bright side, compared to the best of breed, ultra suave and smooth top tier ss power amps (pass labs/first watt, accuphase, upper hegel, best of classe, ayre acoustics and so on...) -- i had the aria integrated which could be a little sizzly and unruly up top, and i have kept a beloved sa30 class a amp -- love that amp, but it is a touch lively/airy on top, but much more controlled than the belles class ab stablemates