Rev | Pass Labs SR2 specification

The “SR-2” (second Son Of Rushmore) loudspeaker is Pass Laboratories third entry into the often-confusing world of loudspeakers, a world fraught with claims of new technology and brilliant technological breakthroughs. Pass Laboratories claims no inclusion of special technology in the SR-2, only Nelson Pass’s meticulous attention to detail, a strong commitment to using the finest available parts and the love of experiencing the finest in recorded music in your own environment.

The first Pass Labs loudspeaker was “Rushmore” a no compromise system built around what we sincerely believed were the finest, high efficiency drivers available anywhere in the world. Those drivers were mated to four purpose built class A amplifiers, electronic crossovers and level controls into a self contained, all encompassing package.

Rushmore was an uncompromising product that relied on us, the maker, having complete control over all aspects of the listening chain with the exception of the source and material.

The Rushmore aimed for high dynamic contrast and control with very low distortion. This was achieved with the finest quality “strong motor” drivers intimately coupled to single-ended Class A amplifiers. The result was a stunning display of clarity and dynamics.

Realizing that many customers already have favorite electronics or appreciate the opportunity to choose and substitute electronics and cables as their preferences change. Pass Laboratories set out to design a new family of passive speakers that would accommodate a wide variety of customer owned electronics with as little

SR2 Owners Manual

Rev 0.2

SR2 specifications

Pass Labs SR2, the latest addition to the highly respected Pass Labs family of high-fidelity audio components, has made a significant impact on the audiophile community. This stunning piece of engineering represents a continuation of the brand’s commitment to delivering an unparalleled listening experience through cutting-edge technology and thoughtful design.

The SR2 is a stereo power amplifier that boasts a robust power output, enabling it to drive a wide range of speakers with ease. With an output rating of 200 watts per channel into 8 ohms and 400 watts per channel into 4 ohms, the SR2 is built to handle complex musical passages while maintaining clarity and dynamic range. This power capability is complemented by an impressive current delivery, ensuring that it can manage even the most demanding loads.

One of the standout features of the SR2 is its use of the unique Pass Labs Class A amplifier topology. The design minimizes crossover distortion and preserves the natural harmonic richness found in music. By operating in Class A mode, the SR2 delivers a warm, inviting sound characteristic that is often sought after by audiophiles.

The SR2 also incorporates advanced circuit technologies, such as the fully complementary output stage and a high-speed feedback mechanism. This allows for a refined response across the frequency spectrum, resulting in low levels of distortion and a high degree of linearity. The result is a soundstage that feels expansive and immersive, with an incredible sense of space around instruments and vocals.

Aesthetically, the SR2 carries the hallmark design elements of Pass Labs, featuring an aluminum chassis with a distinctive brushed finish. The elegant front panel includes a simple yet functional control interface, making it easy for users to operate. Additionally, the amplifier is equipped with premium components throughout, including top-quality capacitors and resistors, which adhere to Pass Labs' high standards for performance and reliability.

Thermal management is another crucial aspect of the SR2's design. The ample heat sinks ensure that the amplifier remains cool during operation, promoting longevity and consistent performance. The unit also offers a standby mode, conserving energy when not in active use without sacrificing sound quality.

In summary, the Pass Labs SR2 is a remarkable amplifier that brings together power, precision, and artistry. Its advanced technologies and thoughtful engineering make it a compelling choice for both audiophiles and music lovers alike, ensuring that every listening session is a memorable experience. Whether you're listening to the delicate nuances of a string quartet or the thunderous depths of a rock concert, the SR2 is designed to deliver a truly captivating performance.