X150.5 Owners Manual

Looking at the rear panel you will see the IEC 320 AC power cord receptacle, a mains power switch, two pairs of output connectors, a pair of binding post connectors for remote turn-on, two RCA input connector and two XLR balanced input connectors.

Make sure that the mains power switch is off (down). Plug the AC cord into the back of the amplifier, and then into the wall. Then turn the breaker switch on (up). The lights in your house may blink when the power supply charges the capacitors; this is normal. This mains power switch is not to be used as a safety disconnect during servicing and is not a substitute for unplugging the power cord.

On the front panel, the “Standby” LED indicator should be glowing blue, indicating that the power is on. The “Power” LED should not be on. If the “Power” LED is on, don’t get excited, just use the front panel stand-by button to go into stand-by mode, with the “Standby” LED on and the “Power “ LED off.

OK, so the amplifier is sitting there in stand-by mode with just the single blue LED lit. No speaker connected, as yet. You can go ahead and connect the source and speakers. Some speaker cables are very difficult to work with due to physical size and construction, make sure the speaker connections do not short together. It is recommended that you connect the speaker ends of these cables first.

Some powered subwoofers require an audio signal ground reference and their makers may suggest that a black speaker terminal is where this voltage reference might be found. On complementary designs, which would be typical of all power amps produced by Pass Laborato- ries™, this is an incorrect and unsafe assumption. On all Pass Labo- ratories™ power amplifiers a reference of 0 volts will be found only at pin 1 of the XLR input or at the shell of the RCA input.

Reference connections for these devices require special consideration when used with our product. If you have such a device, and wish to use it with our product, please contact our Foresthill, California fac- tory for specific instructions.... you have been warned.

The amplifier can be driven single-end or balanced, if driving the am- plifier single-ended, leave the supplied jumper in place (between pins 1 & 3 on the XLR). Your amplifier will operate without the jumper in place, but performance will be significantly diminished.

Now that the source component is connected, make sure there is no signal coming from it, probably by turning the volume all the way down. With the speakers connected, push the front panel button to activate the amplifier. The “Power” LED will come on.

5

Page 4 Page 6
Page 5
Image 5
Pass Labs X150.5 owner manual
Page 4 Page 6

X150.5 specifications

Pass Labs has long been a staple in the high-end audio industry, and the X150.5 power amplifier exemplifies the brand’s commitment to superior sound quality and innovative engineering. Designed for audiophiles seeking a blend of finesse and force, the X150.5 offers a unique array of features, technologies, and characteristics that distinguish it from its competitors.

At the heart of the X150.5 is its class A output stage, which provides an unmatched level of linearity and accuracy in sound reproduction. This design minimizes distortion, ensuring that the audio signal is as close to the original recording as possible. With 150 watts per channel into 8 ohms, and 300 watts into 4 ohms, the X150.5 delivers robust power that can drive a wide range of speakers with ease.

One of the key technologies featured in the X150.5 is Pass Labs’ unique “Super Simple” circuit design, which streamlines the signal path and reduces component count. This results in improved fidelity and a more natural sound signature. The amplifier is also equipped with a fully-balanced input stage that allows for better noise rejection, making it suitable for use in complex audio setups.

The X150.5 is known for its exceptional dynamic range and the ability to handle transient peaks without strain. This feature is crucial for maintaining the emotional impact of music, whether it’s the subtlety of a solo piano or the explosive energy of a full orchestra. Additionally, the amplifier’s high damping factor gives it precise control over speaker cones, resulting in tighter bass response and clearer mids and highs.

Constructed with both aesthetics and durability in mind, the X150.5 features a robust, solid aluminum chassis that helps to reduce vibration and electromagnetic interference. The sleek design is not only visually appealing but also functional, allowing for optimal heat dissipation. Furthermore, the amplifier employs high-quality components, including oversized power supply capacitors and gold-plated connections, ensuring longevity and reliability.

In terms of connectivity, the X150.5 offers both RCA and XLR inputs, providing flexibility for various audio sources. It also features a convenient bias adjustment system, allowing users to fine-tune the amplifier’s performance to suit their preferences.

Overall, the Pass Labs X150.5 power amplifier stands out as a remarkable piece of audio engineering that combines advanced technology with a profound understanding of music reproduction. Whether you are a seasoned audiophile or a newcomer to high-end audio, the X150.5 promises an engaging listening experience that brings your favorite music to life with stunning clarity and detail.
Top Page Image Contents