Operational Notes

SWITCHINGON

The power switch is located on the lower left hand corner of the front panel. Push the top of the rocker switch (1) to turn on the amplifier and the bottom of the rocker to turn off the amplifier. The LED on the right side of the front panel will illuminate indicating that the amplifier is operating. Do not turn on and off the amplifier in rapid succession.

RUNNING

It is not recommended that you leave your amplifier permanently switched on. This only wastes electricity and tube life. Your amplifier has solid state rectification and reaches peak operating condition in approximately 30 minutes.

TUBELIFE

As with all tubes, their quality degrades with age. This is due to cathode emission, a natural process found in all tubes. We recommend that you have your amplifier checked every 3-4 years, depending on usage, sometimes the amplifier will require re-tubing after this time has elapsed, although we have many cases of extreme long life recorded-- 40,000 hours and still counting!.

SPECIAL NOTE

The Manley 120 Watt Monoblocks are equipped with a voltage change-over switch located under the bottom cover. Insure that this switch is set at 110 if your mains voltage is 100,110,120, or 127 Volts. Set this switch to 220 if your mains voltage is 220, 227, or 240 Volts.

Changing the light bulb:

The lamp which back-lights the Manley insert on the faceplate is a fuse-lamp style lamp. Should it burn out, turn off and unplug the amplifer from the mains first. Then remove the bottom cover. Carefully pry out the old lamp from its clips and replace with one of the same type. Although it looks like a fuse, it is really a light bulb!! Don't put a fuse in there!!

The fuse lamp is 1 1/4" x 1/4" 8Volts, 300mA.

Fuses:

Always replace with same type and rating. Should the B+ fuse blow (the fuse nearer to the output binding posts) this usually indicates a tube has blown. One should visually inspect the pcb to look for any burnt resistors a blown tube may have taken out. Also a good test is to measure the resistance of each catode resistor. This is done in a similar fashion to checking the bias, except do this test with the amplifier turned OFF, and set your meter for Ohms. Each cathode resistor should measure 10 ohms.

120 Watt Monoblock Amplifier specifications

Manley Labs has long been revered in the audiophile community for its commitment to producing high-quality audio equipment, and the 120 Watt Monoblock Amplifier is no exception. This powerhouse amplifier exemplifies the brand's dedication to a superior listening experience, offering a blend of premium sound quality and robust functionality that caters to the needs of discerning music lovers.

At the heart of the 120 Watt Monoblock Amplifier is its stunning power output, capable of delivering 120 watts per channel into an 8-ohm load. This ample power ensures that the amplifier can drive even the most demanding speakers with ease, maintaining clarity and detail across all volume levels. The use of high-quality transformers and carefully selected components further enhances the amplifier's efficiency and performance.

One of the standout features of the Manley Labs amplifier is its tube-driven design, utilizing high-performance vacuum tubes to enrich the audio signal. This not only adds a warm, natural character to the sound but also produces a harmonic richness that solid-state amplifiers often struggle to replicate. The amplifier employs 6550 power tubes, known for their linearity and high output capability, providing a dynamic range that breathes life into any musical genre.

In terms of technology, the Manley 120 Watt Monoblock Amp features a fully balanced design. By minimizing the potential for noise and distortion, this balanced architecture contributes to an overall cleaner audio output. The amp also incorporates high-quality capacitors and resistors, ensuring that signal integrity is preserved throughout the listening experience.

The build quality of this amplifier is exceptional, with a rugged chassis that includes top-notch connectors and a solid finish, which not only enhances its durability but also adds an aesthetic touch to any audio system. Additionally, the monoblock design provides flexibility for bi-amping configurations, allowing audiophiles to tailor their system for optimal performance.

Another impressive characteristic of the Manley Labs 120 Watt Monoblock Amplifier is its thermal management system. The amp is designed to run cool, which increases its longevity and ensures consistent performance even during extended listening sessions.

In summary, the Manley Labs 120 Watt Monoblock Amplifier stands out as a premium audio solution that combines power, elegance, and cutting-edge technology. Its tube-driven design, exceptional build quality, and advanced engineering make it a worthy addition to any serious audio setup, promising a listening experience that is both immersive and true to the artist's vision. With Manley Labs, every note comes to life, making each listening session a memorable one.