Pass Labs X150 power amp from Nelson Pass - see photo

Pass Labs X150 high current stereo power amplifier, silver finish, in good condition. Built and designed by the legendary high end electronics guru – Nelson Pass. High current capability demonstrated by its power ouput doubling from 150 wpc into 8 ohms to 300 wpc into 4 ohms. This powerhouse utilizes a total of 40 output transistors (20 matched devices per channel) to deliver the high current and power needed to drive difficult speaker loads with ease.

At the core of this amplifier is Nelson Pass’ patented SuperSymmetry circuitry which provides the fundamental technology used in the balanced design of this amplifier is is claimed to reduce distortion and noise by an order of magnitude over other matching techniques. Has the same excellent build quality and workmanship in the fine tradition of Pass Labs products featuring a beautiful and thick faceplate machined out of aluminum and generous heatsinks. A true balanced design, the amp accepts both balanced XLR and single-ended RCA input connections. The IEC power cord is detachable and upgradable.

Below are some highlights of the X150 review by Stereo Times:

“Listening to this amplifier makes it obvious that the focus is on naturalness, clarity, and dynamics. This is not a warm, or tube-like sounding amplifier by design. It is articulate with its detail and natural sounding in its presentation, letting you focus on the music and not the equipment. In short, I didn't find the X150 exhibited any coloration … The X150 possesses a crisp and detailed sound without the over-extended or bright treble found on many solid-state amplifiers. The slow plucks of the bass strings are realistic, tight and deeply reproduced without sounding boomy. The X150 really demonstrated an ability to drive deep low bass. This is definitely a strong quality of this amplifier … I think the X150 is a top performer in its price and power class. This amplifier provides plenty of power for the money, but most of all it provides a sound that is focused on the music.”

There are 16 consumer reviews of the Pass X150 amp on AudioReview dot com (average score: 4.88/5.00) if you are interested in knowing what other audio enthusiasts think of this amp.

Overall cosmetic condition is good. Rated a '7' because of a few tiny, minor marks around the edges of the faceplate, handles, top cover, and heatsinks. The amp will be carefully and securely packed to ensure safe shipping. I have a copy of the owner’s manual.

Please check out the matching Pass Labs X2.5 preamplifier also for sale at Audiogon.