depends on whether yure running triode or ultralinear. 25w vs 50w. but, i've heard it drive a pair of proac 1sc's and a pair of proac tablette 8 reference's in a decent sized (~14x22x10) room in triode, & it did fine. the proac mini's are 86db/1w/1m, iirc... if ya really wanted to rock out to metal or something, then put it in ultralinear, & add subs from the optional sub outs.
doug s.