I have a pair of the little brother to this amp, the MG SPM6, driving Omega Super 3v2 single-driver speakers augmented with Tannoy ST1 super-tweeters. The soundstage is as wide as required by the recording but quite deep; the bass I get is also amazingly good, especially given the limitations of the Omega's 4" drivers. Highs are delicious, sweet & airy and the midrange is simply delightful. Tubes are NOS RCA EL34s & GE 5 Star 5751s. The amps are dead quiet, except for some very occasional tube roar that lasts maybe 30 seconds once in a while. The only problem I've had is with preamp matching: the only "preamp" I've been able to get to work in the system is a pair of Luminous Audio Axiom Signature mono passives, despite having tried several tube preamps. All of the tube units caused a huge amount of hum, which I'm at a loss to explain.