Servo 201a is a compact 1U, 19-inch rack-mount power amplifier suitable for near-field monitors, small installs, and live use. It delivers 100 W per channel into 4 ohms in stereo and 200 W into 8 ohms when bridged mono. With a bipolar design and toroidal transformer supply, it offers reliable, quiet operation. It features independent left/right level controls, 10-segment 3-color meters, and 1/4" TRS and RCA inputs with a headphone jack and mute. Discontinued.