X350.5 Owners Manual

into the back of the amplifier, and then into the wall. Then turn the breaker switch on (up). The lights in your house will blink when the power supply charges the capacitors; this is normal. This magnetic breaker 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. You must choose either XLR or RCA inputs it is not advised to try and run both concurrently.

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.

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Pass Labs X350.5 owner manual
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X350.5 specifications

The Pass Labs X350.5 is a high-performance power amplifier renowned for its exceptional sound quality and cutting-edge technology. Designed by acclaimed audio engineer Nelson Pass, the X350.5 embodies a commitment to delivering a rich and immersive listening experience, making it a favorite among audiophiles and music enthusiasts alike.

One of the standout features of the X350.5 is its Class A/B amplifier design. This brilliant configuration allows for a balance between high efficiency and class A sound reproduction. The amplifier operates in pure Class A mode for lower power demands, providing a pristine audio signal with reduced distortion. When power requirements increase, it seamlessly transitions to Class AB operation, ensuring consistent performance across a wide range of playback levels.

The X350.5 is rated for 350 watts per channel into 8 ohms, which provides ample power to drive even the most demanding loudspeakers. Its ability to deliver 700 watts into 4 ohms ensures that dynamic peaks in music are handled effortlessly, preserving the integrity of the audio signal. This capability is further enhanced by the amplifier’s robust power supply, which features a substantial toroidal transformer and large reservoir capacitors, ensuring adequate power is always available for high transient demands.

Another defining characteristic of the X350.5 is its innovative thermal management system. The amplifier utilizes a patented biased circuit that keeps the output devices within an optimal temperature range, enhancing longevity and reliability while maintaining sound performance. The unique design also incorporates oversized heat sinks that dissipate heat efficiently, allowing the amplifier to operate cool under heavy loads.

The X350.5 features a balanced and unbalanced input configuration, making it versatile enough to integrate seamlessly into various audio setups. The careful attention to detail in the internal component quality and layout reflects Pass Labs’ dedication to minimizing noise and maximizing signal integrity.

With its sophisticated design, the Pass Labs X350.5 offers audiophiles an unrivaled listening experience, characterized by rich timbre, precise imaging, and expansive soundstage. This amplifier is not merely a piece of equipment; it's an invitation to experience music as it was meant to be heard, bringing recordings to life in the comfort of one's home. The X350.5 exemplifies Pass Labs' philosophy of combining art and precision in the pursuit of audio excellence.
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