Pass Labs X1 instruction

X1 Owner’s Manual

decreases its value; and is also balance left. If any control is used the display reverts to the last saved output level, therefore we suggest you reduce the volume before switching inputs.

The remote control uses the same four-button protocol, though it is physically arranged slightly different than the X1’s front panel. The far left button “<” is mode left and the far right button “>” is mode right. The top button “^” is select up, and the bottom button “v” is select down. The display shows the active function, just as it would when using the front panel controls. The display has two brightness levels and off, selected by the up “^” and down “v” buttons when the mode “display” is visible.

The electronic volume control allows greater than 60 dB range and is driven by a microcontroller that reads an optical encoder that serves as a front panel volume control. In this manner tracking of the volume of the two balanced channels is possible with accuracy unavailable on any ordinary volume control, assuring precise level steps and high common mode rejection in balanced circuits.

Wayne has included some unique features on the X1 that give it unprecedented versatility.

At the extreme virtual right of the mode selection is the function labeled “gain”. This control allows you, the user to adjust the gain of the X1 to extract the best possible performance out of a variety of source components of different manufacturers. The “Low Gain” setting allows for 4 dB of gain from the X1 and the “Hi Gain” allows for 14 dB of gain. The 10 dB difference between these two settings require that you pay attention to volume as you switch back and forth between High and Low Gain. With a number of products one setting may convey a greater sense of musicality than the other. Let your ears be the final arbiter. With our own X series amplifiers which are quite high gain (30 dB), we find the +4 dB setting to be most satisfying.

The unity function too bears special attention. This control is associated only with input number 4 and has two positions selected with the up/down arrows. The up arrow toggles to a straight- through function with neither attenuation nor gain. This function is useful in that it allows the preamplifier to function as a unity buffer for use with components that best function with their own volume controls, such as surround processors. When the right-front and left-front outputs of the processor are routed through input 4 of the X1 (with the gain of the X1 set for Unity gain), the volume will be under full control of the processor and the X1’s action will be

X1 specifications

Pass Labs X1 is a high-end preamplifier that embodies the very essence of cutting-edge audio engineering, combining advanced technologies with superior craftsmanship to deliver an exceptional sonic experience. Known for its neutral and transparent sound signature, the X1 is designed to serve as the heart of a high-fidelity audio system, providing precise control over volume and input selection while ensuring signal integrity is maintained.

One of the defining features of the Pass Labs X1 is its fully differential architecture. This design not only enhances noise rejection but also minimizes distortion, resulting in a clean and accurate reproduction of music. The X1 employs a direct-coupled topology, allowing for a wider bandwidth and increased dynamic range, essential for capturing the subtleties of any audio performance.

The X1 also integrates a sophisticated power supply, utilizing separate transformer windings for the analog and digital circuits. This isolation reduces cross-contamination between sections, which is crucial for maintaining the integrity of the audio signal. The power supply is supplemented by high-quality capacitors and regulators, ensuring that the preamplifier operates with stable voltage and low noise.

In terms of connectivity, the Pass Labs X1 offers a comprehensive array of inputs and outputs, including balanced XLR and unbalanced RCA connections. This versatility allows it to interface seamlessly with a variety of sources and amplifiers, making the X1 suitable for both audiophile and professional environments. Additionally, the preamp features a remote control for added convenience, allowing users to adjust settings from a distance without compromising sound quality.

Another notable characteristic of the Pass Labs X1 is its rugged build quality. Constructed using high-grade materials and meticulously tested, the unit not only looks elegant but is designed to last, providing years of reliable performance.

Ultimately, the Pass Labs X1 is a testament to the brand's commitment to excellence in audio reproduction. Whether used in a dedicated listening room or as part of a professional setup, the X1 delivers a listening experience that is both immersive and true to the original recording, making it an invaluable component for any serious music enthusiast or audio engineer.