Pass Labs

Pass Labs XS150 followed by deployment in Nelson's First Watt designs, circuit modification captured the unique tube-like sonic footprint of SITs from much higher-output MOSFET devices used in the Xs series.

The Xs 300 operates in pure Class A and produces 300 watts of power into an 8 ohm load. The gain is 26 dB, providing a very clean and rich sound. Balanced XLR and unbalanced RCA inputs are available for connection. In active mode, the device consumes a solid 900 watts, which reflects Class A and the status of a powerful amplifier.

The Pass Labs XA 200.8 is a Class A mono amplifier with 200 watts at 8 ohms and 400 watts at 4 ohms. It provides a frequency range of 1.5 Hz–100 kHz, a gain of 26 dB and a damping factor of 200. It has very low distortion (1%) and a high power reserve for complex music.

The Pass Labs XA160.8 is a powerful Class A mono amplifier with an output power of 160 watts at 8 ohms, a gain of 26 dB and a frequency range of 1.5 Hz–100 kHz. Equipped with 72 MOSFETS, it provides low distortion, high damping (200) and high input impedance (50/100 kOhm). It weighs 123 pounds and measures 19×21.5×11 inches. It is ideal for transmitting lively, detailed and deep music with powerful attacking sound and excellent musicality.

The Pass Labs XA100.8 is a Class A mono amplifier with a power of 100 watts at 8 ohms, a gain of 26 dB, a frequency range of 1.5 Hz–100 kHz and a damping of 200. It has balanced and unipolar inputs, low noise and provides a realistic scene and dynamics.