Pass Labs XS300

The Xs 300 is the kind of amplifier that makes “state of the art” feel like a real thing. It delivers startling realism at any level—micro-detail, dynamics, tonal density, and scale—without ever sounding forced.

This is reference Class A power with the finesse to disappear completely. When the amplifier stops being a component and becomes simply the music, you’re in Xs territory.

It’s also a masterclass in control: bass arrives with authority and shape, images hold steady through big swings, and the stage remains expansive and organized. If your system is revealing and your speakers can take advantage of true Class A headroom, the Xs 300 is the kind of endgame that keeps getting better as the rest of the chain improves.

SPECS AT A GLANCE

• Class / Type: Class A, Mono
• Power: 300 W / 8 Ω (per channel)
• Gain: 26 dB | Inputs: XLR / RCA
• Power consumption: 900 W | Chassis: 2
• Weight: 134 / 172 lbs (per chassis)