A linear power supply is employed in contrast to a soul robbing digital power supply employed in typical designs. An oversized 310VA toroidal transformer and 54,000 microfarads of filter capacitance make up the substantial power supply that is the engine of the S-150m. Today's multi-channel music and movie soundtracks place tremendous stress on amplifiers. Each S-150m employs eight output devices to deliver the exact power required by the speakers under any demand. All speakers benefit from greater power, the more the better. The S-150M drives 150 Watts into 8 Ohms and 300 Watts into 4 Ohms. Featuring circuitry sourced from the Evolution amplifiers, the S-150m includes technology previously incorporated in the reference level components only. The design is executed with Krel. Current Mode circuitry featuring balanced topology for the lowest noise and true insight into the recording. Class A input, pre-driver, and driver stages provide the most accurate signal path for critical low level signals. Surface mount technology is utilized for maximum circuit density resulting in the widest dynamic range and bandwidth possible. The amplifier circuitry also features very low negative feedback for improved clarity and detail resolution. Each S-150m is only 3.4' wide allowing 5 S-150m amplifiers to fit in the same space normally occupied by a full size component. The S-150m includes 12V trigger input and output connections. High performance WBT speaker binding posts and input terminations complete the elegant rear panel.