Introduction, Wayne Colburn | Pass Labs pre-amplifier specification

Introduction

X0.2 Owner’s Manual

The X0.2 is an ultra high quality three chassis line-stage audio pre-amplifier featuring remote control and internal power supply. It combines a completely new circuit topology with traditional construction representing thirty five years of preamplifier design.

This pre-amplifier flows from a commitment to create the best sounding product: a simple circuit with the most natural sonic characteristics. Derived from US Patent # 5,376,899, the X0.2 integrates power MOSFET and JFET devices in a simple Class A topology in order to deliver the finest sound possible.

The Super-Symmetric gain circuitry used in the X0.2 is unique in providing superior flexibility and performance with both balanced and unbalanced inputs and outputs, converting one to the other as desired without extra circuitry and without performance degradation.

The X0.2 minimizes the number of components in the signal path, and yet retains exemplary objective performance specifications. It pushes the edge of the art in exploring how much subjective quality is obtainable with a new but very elementary gain stage.

The X0.2 employs a patented new type of volume control that offers significantly better performance than seen before in an electronic control. It provides over 60 dB of range, large voltage swing and very good measured performance. The distortion and noise is at 1/10 and the dynamic range 100 times the previous state of the art in active attenuation. Most importantly it is subjectively outstanding; better than any potentiometer we have evaluated.

The fluorescent display is a very special device. Not only will you find its blue color highly attractive and readable, it is far more reliable than the usual LED or LCD display.

Very few people are involved in the production of this product. I supervise all phases of the construction, and I test each pre-amplifier myself. If you have questions, comments, or problems, please feel free to contact me directly.

Thank you for purchasing this pre-amplifier. It is my sincere hope that you will enjoy its sound as much as I do.

Wayne Colburn

Vice President, Design

pre-amplifier specifications

Pass Labs, an esteemed name in the realm of high-fidelity audio equipment, has garnered a reputation for producing premium amplifiers and pre-amplifiers designed for audiophiles who crave exceptional sound quality. Among its acclaimed offerings is the Pass Labs pre-amplifier, a device that captures the essence of music reproduction with unparalleled precision and clarity.

One of the defining features of Pass Labs pre-amplifiers is their use of a fully balanced differential circuit topology. This design significantly reduces common-mode noise, preserving the integrity of the audio signal and ensuring that the listener experiences sound as it was intended to be heard. This topology is especially effective in eliminating distortion and improving dynamic range, hallmarks of a quality audio experience that Pass Labs strives to deliver.

The pre-amplifier is equipped with premium-grade components, including high-quality capacitors and resistors, which are crucial for maintaining signal purity. These components contribute to the overall fidelity of the sound, allowing for rich, detailed reproduction across a wide frequency range. Additionally, the circuit design is optimized for low noise and low distortion, ensuring that even the most subtle nuances of music are faithfully rendered.

Another standout characteristic of the Pass Labs pre-amplifier is its seamless integration with various audio sources. With multiple input options, including XLR and RCA connectors, the pre-amplifier accommodates a variety of devices, from turntables to digital players. This versatility makes it an ideal choice for audiophiles with diverse audio setups, ensuring compatibility regardless of the source.

To enhance user experience, Pass Labs incorporates intuitive controls and a user-friendly interface, allowing for easy adjustments and monitoring of audio settings. Features such as a built-in volume control and selectable input sources provide convenient options for users, ensuring a streamlined listening experience.

Moreover, the robust build quality of Pass Labs pre-amplifiers exudes a sense of durability and sophistication. The solid chassis and meticulous attention to detail not only serve to protect the internal components but also reduce external vibrations that could interfere with sound performance.

In conclusion, the Pass Labs pre-amplifier stands as a prime example of engineering excellence in high-fidelity audio. With its balanced differential circuit topology, premium components, and user-friendly features, it is designed to meet the discerning demands of audiophiles. Whether in a home listening environment or a professional setting, the Pass Labs pre-amplifier promises to deliver an extraordinary audio experience that brings music to life.