List of products by brand Pass Labs

The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.

At Pass Labs we build Fet amplifiers with excessive output stages, huge heat sinks and massive power supplies. We use the highest quality components in simple linear topologies, assembled and tested with care and subtlety. They measure well, sound great, and are reliable. Twenty plus years of ongoing innovation have kept the X and XA amplifiers at the forefront of high-end audio.

The INT-25 embodies all this and less. A smaller stereo Class A amplifier at a lower price, it takes advantage of the lower power requirements to have simpler single-ended circuitry and fewer parts in the signal path. This also allows elimination of degeneration, “that other negative feedback” in all stages.

Like the INT-60, the INT-250 utilizes the synergies developed in the .8 series power amplifiers. Unlike the INT-60, however, it brings 250 watts per channel of listening pleasure. With higher power MOSFETs and more of them, the INT-250 drives large, demanding and relatively inefficient loudspeakers at higher volumes without batting an eyelash, singing beautifully. Just incredible music from one component.

This integrated amplifier sets a new benchmark in significantly narrowing any perceived performance gap between separate components and integrated amplifiers. Advanced technologies and real-world testing combine to create the INT-60 which presents 60 glorious watts per channel into 8 ohms, and doesn\'t leave class A until 30 watts thanks to its high-bias operation. This larger class A operating envelope brings lower distortion and greater loudspeaker control, delivering higher quality musical fidelity for your enjoyment.

X150.8 150 Watt Class AB Stereo

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

X250.8 250 Watt Class AB Stereo

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

X260.8 260 Watt Class AB Mono

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

X350.8 350 Watt Class AB Stereo

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

X600.8 600 Watt Class AB Mono

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

XA100.8 100 Watt Class A Mono

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

XA200.8 200 Watt Monoblock

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

Pass Labs XA25 Stereo Amplifier

Entering their 22nd year of production, the X and XA power amplifiers have remained at the cutting edge of audio through continuous innovation and refinement. At Pass we build amplifiers with excessive output stages, huge heat sinks and massive power supplies.

XA30.8 30 Watt Class A Stereo

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

XA60.8 60 Watt Class A Mono

We’re excited! Because we’re celebrating our 23rd year by presenting the best amplifiers we’ve ever made. Our New Point 8 Series, X.8 & XA.8, operate “higher” into Class A than ever before and bridge the gap between measured performance and subjective experience.

Designed for audiophiles by even more demanding audiophiles, they invite listeners into the music as never before. Even more, they represent a summation of our expertise in designing amplifiers, while elegantly expressing our philosophy of more amplifier, more progress and more music.

The new XP-12 starts with a new power supply. It uses an efficient toroidal design with both an electrostatic and Mu metal shield along with vacuum impregnating and epoxy fill. This gives us a very quiet transformer both electrically and mechanically.

The power supply circuitry itself is also lower noise and has additional filtering, a little more complicated but worth it.

XP17 uses the new-shielded low noise toroid and input filter module, like the XP-12. The power supply has an extra stage of RC filtering.  We have lower radiated and mechanical noise.

The XP17 has an all-new input circuit that is symmetrical and lower in noise and distortion with greater drive capability. Noise is the most prominent part of THD+N in the first section of a phono stage. By lowering noise we get better resolution and dynamics.

The new design uses double shielded low noise toroidal transformers in external supply connected via aviation grade circular connectors using silver over oxygen free copper. The power supply is dual mono with two transformers with lower radiated and mechanical noise. Noise is the most prominent part of THD+N at low levels, so by lowering noise we get better resolution and dynamics.

The gain circuitry continues to use our favorite transistors from Toshiba but has a larger, higher biased, output stage like the Xs Preamp, and includes auto bias.

The twin chassis XP-27 eclipses the already exceptional performance of the well-reviewed and well-received XP-15, XP-25 & XP-17: delivering enhanced RIAA performance at a fraction of the previous distortion.  The new design uses double shielded low noise toroidal transformers in external supply connected via aviation grade circular connectors using silver over oxygen free copper.

In PassLabs we are constantly working on and listening to new circuits and components, increasing our knowledge and seeking better sound and enhanced product reliability. That time has come for the XP-32.

The new design uses uses double shielded low noise torroids in a true dual mono topology for the gain channels and another transformer, linear power supply dedicated to the control architecture.