Pass Labs XA25

Pass Labs XA25 – Class A Power Amplifier

Less circuit, more music

Nelson Pass has a habit of stripping things back until only the essentials remain, and the XA25 is a fine example of that discipline. There's no front-panel meter, no balanced inputs, no excess headroom to speak of — just a simplified three-stage Class A circuit with four output devices per channel. Consequently, the signal path stays short, and that brevity shows up directly in the amp's resolution and timing.

What it does well

25 watts per channel sounds modest on paper, yet the XA25 rarely feels underpowered with the right speakers. Its damping factor and current delivery keep things controlled, even when the load gets tricky. Since the amplifier runs in Class A throughout its operating range, there's none of the crossover distortion that creeps in at low listening levels elsewhere. Above all, it's the micro-dynamics and sense of space that stand out — instruments retain their texture rather than blurring into a wall of sound.

Where it fits

This is an amplifier for speakers with reasonable sensitivity rather than power-hungry designs. Furthermore, the single RCA input keeps things simple, which suits systems built around a single source or a well-sorted preamp. Owners tend to describe the XA25 less in terms of specifications and more in terms of what it lets them forget — namely the electronics — thereby putting the music first.

At Novus Audio

The Pass Labs XA25 features regularly in our rotating demo setups, paired with a range of speakers and source components. Therefore, hearing it in a system close to your own is straightforward — just get in touch to arrange a listening session.

Specifications

• Class: Class A, Stereo
• Power: 25 W at 8 Ω per channel
• Gain: 20 dB
• Inputs: RCA
• Power consumption: 240 W
• Standby consumption: <1 W
• Dimensions (W x D x H): 43.2 x 43.8 x 15.2 cm
• Weight: 22 kg

Frequently asked questions

Which speakers suit the Pass Labs XA25 best?

Speakers with moderate to high sensitivity tend to work best. Low-sensitivity or highly reactive loads are better served by a more powerful model in the XA series.

How does the XA25 compare to the XA30.8?

The XA25 is the more minimalist of the two, with a single RCA input and lower output. The XA30.8 adds balanced inputs and greater power for more demanding applications.

Can I hear the Pass Labs XA25 at Novus Audio?

Yes, it's a regular fixture in our demo rotation. Get in touch via the contact page to arrange a session.