In’s and Out’s

XP-20 Owner’s Manual

As with all audio electronics the power cable should be the last thing attached and the first one removed any time you hook up or remove equipment from the signal chain. The DIN-25 umbilical cable should never be connected or removed with the power supply chassis plugged into house power.

The preamplifier has five sets of stereo input connections, both single-ended and balanced output connections and a full function remote control in addition to the normal complement of front panel control functions.

The preamplifier’s voltage and current rating are indicated by affixed tag on the rear of the preamplifier’s separate power supply. It will indicate 240 volts, 220 volts, 120 volts, or 100 volts. A 1.0 amp 3AG slow blow fuse is provided with 100-120 volt units, and a

0.50amp slow blow fuse is provided with 220-240 volt units. The input frequency rating of the power supply is 50 to 60 Hz. The preamplifier typically draws approximately 25 watts of power from the utility mains during operation. Please verify that the indicated voltage requirement of this preamplifier’s power supply is consistent with the utility voltage at your location.

We have provided a standard IEC AC power cord that fits into the IEC 320 line receptacle at the rear of the power supply chassis. The preamplifier and power supply is equipped for operation with an earth ground provided by the users AC outlet. Do not defeat this safety ground. The chassis and circuit ground of the preamplifier is connected to earth through a power thermistor, which gives a ground connection for safety but helps avoid ground loop related noise issues. Please connect the power supply to the preamplifier chassis by the supplied umbilical before plugging the power supply into

the wall. Conversely please unplug the power supply from the wall before disconnecting the umbilical cable.

There are a total of five inputs. Two of the five inputs are balanced XLR only. The other three inputs are single-ended only. The XP-20 also has a “Tape Loop” with single ended inputs and outputs. There are three pairs of outputs available with identical gain structure. One pair Balanced, two pairs single-ended. You may use more than one output at a time.

The single ended outputs are paralleled, but under most circumstances will drive several devices at once, with no anticipated ill effects by virtue of the XP-20’s low output impedance and high current capability. The balanced outputs are derived from their own

XP-20 specifications

The Pass Labs XP-20 is a high-performance preamplifier that embodies the sophisticated engineering and design philosophies of its founder, Nelson Pass. Renowned for its exceptional sound quality and performance, the XP-20 is an evolution of its predecessor, the XP-10, and is designed to meet the needs of audiophiles and music lovers who demand the very best in their audio equipment.

At the core of the XP-20 is a fully balanced circuitry design, which allows for improved signal integrity, reduced noise, and enhanced dynamic range. This balanced topology not only minimizes distortion but also ensures that the audio remains pure and true to the source material. The preamplifier features dual differential gain stages, which contribute to its remarkable clarity and transparency, making it a perfect partner for high-end power amplifiers.

One of the standout features of the XP-20 is its extensive input and output options. The unit includes multiple single-ended and balanced inputs, ensuring compatibility with a vast array of audio sources, including CD players, turntables, and digital streaming devices. The outputs are equally versatile, allowing for easy connection to power amplifiers or active speakers.

Another key characteristic of the XP-20 is its massive power supply, which provides the necessary current and voltage to drive the preamp's demanding circuitry. This robust power supply is designed with low noise and high regulation, ensuring that the unit operates efficiently while maintaining sonic fidelity.

Furthermore, the XP-20 incorporates advanced volume control technology, allowing for precise adjustments without compromising audio quality. The volume control is designed to minimize signal degradation, which results in a more accurate representation of the music.

Thermal management is also a critical aspect of the XP-20's design. With substantial heatsinking and ventilation provisions, the unit remains cool even during heavy use, ensuring long-term reliability and performance.

The build quality of the Pass Labs XP-20 is exceptional. The chassis is solid and well-constructed, with an aesthetic that exudes elegance and professionalism. It's available in a sleek black or silver finish, making it a stylish addition to any audio system.

In summary, the Pass Labs XP-20 is a preamplifier that exemplifies high-end audio engineering. Its combination of balanced circuitry, versatile connectivity, robust power supply, and meticulous design make it an outstanding choice for those seeking to elevate their audio experience. Whether for critical listening or casual enjoyment, the XP-20 stands as a testament to Pass Labs' dedication to audio excellence.