X0.2 Owner’s Manual

There are a total of five inputs, a separate tape loop and two outputs on each of the pre-amplifier chassis. One chassis is exclusively dedicated to right channel and the other exclusively left channel. Balanced inputs and outputs are via XLR connectors. Single- ended inputs and outputs are via RCA connectors. On the XLR connectors, pin 1 is grounded, pin 2 is the positive signal, and pin 3 is the negative signal.

If your signal source is unbalanced, input will occur through the RCA input connectors, which are in parallel with the XLR connections. When single-ended inputs are used, a shorting jumper, which is provided, should be inserted between pins 1 and 3 of the corresponding XLR connection. The supplied jumpers short the negative input to ground, and provide for optimal performance. The X0.2 preamplifier will function without these jumpers, but gain will be lower and performance will not be optimal.

The unbalanced input impedance of the pre-amplifier is 10K Ohms. In balanced mode, the input impedance is higher, with a differential impedance of at least 20K Ohms.

Next to the inputs on the rear panel of the gain stages, the pre- amplifier offers tape inputs through both XLR and RCA connectors. This output is a direct connection to inputs 1, 2, 3, 4 and 5 when they are selected from the front panel. Input 6 (TAPE IN) is deliberately not available through the tape output connection. Tape input is designated for use with a tape recorder if you have one, and we have arranged that it will not place its output on the tape out, which will prevent you from accidentally creating a feedback connection with your tape machine.

The main outputs are located left-hand of center (viewed from the rear) of the rear panel, two male XLR connectors, and two RCA connectors. The RCA connectors’ ground is in parallel with pin 1 of the XLR outputs, and the RCA hot is fed from an independent summing junction that maximizes the X circuit benefits. The RCA, single-ended, outputs are buffered from the balanced outputs.

In an effort to accommodate a wide range of equipment we have configured this product so that you may use both single ended and balanced outputs at the same time. On the XLR, pin 1 is ground, pin 2 is positive output, and pin 3 is negative output.

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Pass Labs pre-amplifier owner manual
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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.
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