XA-100.5

About the XA-100.5

The Pass Labs XA-100.5 is a pure Class A solid state monoblock power amplifier designed for audiophiles seeking high-fidelity sound with a focus on quality over maximum power. It delivers 100 watts RMS per channel into 8 ohms and 200 watts into 4 ohms, maintaining Class A operation throughout its output range. The amplifier features a gain of 26 dB, an input impedance of 30 kOhms balanced and 20 kOhms single-ended, and a damping factor of 200. It has a very wide frequency response from 1.5 Hz to 100 kHz and low distortion levels (1% at full power, with much lower distortion at typical listening levels). The unit is built with a single chassis, weighs approximately 87 to 110 pounds, and measures 19" wide by 9.2" deep by 21.5" high. It includes balanced XLR and unbalanced RCA inputs and consumes around 270 to 300 watts of power. The XA-100.5 is known for its robust construction, long-term reliability, and the ability to operate in pure Class A mode without bias meter fluctuation, indicating consistent Class A operation. It is