M150

About the M150

The Rogue Audio M150 is a monoblock tube amplifier designed for audiophiles seeking power, grace, and precision. It delivers 150 watts per channel using four KT88 output tubes in a push-pull configuration, with the ability to switch externally between triode and ultralinear modes for sonic flexibility. The amplifier features a slow start circuit to extend tube life, a massive high-capacity power supply, and mechanically isolated transformers for reduced vibration. Inputs include both balanced XLR and single-ended RCA, with heavy-duty gold-plated connectors and separate 4 and 8 ohm speaker taps. The M150 uses matched octets of KT88/KT90 tubes, a welded-wire tube cage, and a machined aluminum faceplate. It is built entirely in the USA and comes with a 3-year limited warranty (6 months on tubes). The amplifier is praised for its exceptional bass control, wide frequency response (5Hz to 50kHz), low distortion, and high damping factor, making it capable of driving a wide variety of speakers with finesse and power. Its design is derived from Rogue Audio's Zeus amplifier and incorporates advanced circuitry such as a mu-follower driver stage and Jensen input transformers for noise reduction and signal integrity. The M150 is regarded as a world-class amplifier with a refined soundstage, imaging, and tonal balance, suitable for both analog and digital sources.