ICON AUDIO MB90 MKIIM-150

摘要

There are a handful of hi-fi companies including Audio Research, VTL, Mcintosh and Icon Audio that regular demonstrate how tube amps need not be weedy, speaker-shy apparitions. The MB90 MkIIm, with its KT150 output tubes, is a case in point as it delivers a full 120W into both 8/4ohm loads (via 8/4ohm taps respectively) in Ultralinear mode, increasing to 135W into 8/4ohm and 185W into 2ohm (4ohm tap) under dynamic conditions [see Graph 1, below]. Distortion is reasonably constant at ～0.05% from 1-10W/8ohm through the midrange but steadily increases at higher output to the notional 1% clipping point at 120W.