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 50 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.

50 WATT MONOBLOCK AMPLIFIER specifications

Manley Labs has long been a respected name in high-fidelity audio equipment, and their 50-Watt Monoblock Amplifier exemplifies their commitment to exceptional sound quality and innovative engineering. Designed to provide audiophiles with a powerful, dynamic, and transparent listening experience, this amplifier is a true reflection of Manley’s dedication to craftsmanship and performance.

The 50-Watt Monoblock Amplifier utilizes a tube-driven configuration, leveraging the unique sonic characteristics of vacuum tubes. This design not only enhances the amplifier's warmth and richness but also ensures a pronounced harmonic accuracy that is often sought after in high-end audio. Manley Labs incorporates premium components, including specially selected tubes and meticulously designed circuits, to provide an audio experience that is both lush and detailed.

One of the defining features of the Manley 50-Watt Monoblock is its robust power output. The amplifier delivers an impressive 50 watts per channel, making it suitable for driving a wide range of loudspeakers with ease. Whether paired with smaller bookshelf speakers or larger floor-standing models, the amplifier maintains clarity and precision across the audio spectrum, allowing listeners to fully enjoy their favorite music.

In addition to its power capabilities, the amplifier includes a well-engineered output transformer, which plays a crucial role in ensuring optimal performance. This transformer is designed to match the impedance of various speaker loads, enabling the amplifier to maintain excellent damping factor and control over bass response while delivering harmonious mids and highs.

The 50-Watt Monoblock Amplifier is also characterized by its clean, simple aesthetic and user-friendly interface. With thoughtfully placed controls and indicators, setting up the amplifier is straightforward, even for those less experienced with audio equipment. The durable chassis is crafted to withstand the rigors of regular use, ensuring longevity while also exuding a classic elegance suitable for any listening environment.

Moreover, Manley Labs embraces modern technological advancements by including features such as an integrated power supply and an innovative cooling system, which not only enhances audio performance but also ensures reliable operation over extended periods.

Overall, the Manley Labs 50-Watt Monoblock Amplifier is a remarkable fusion of traditional tube technology and contemporary engineering, promising audiophiles an engaging listening experience with unrivaled tonal richness and detail. For those seeking a high-quality amplifier that honors both the heritage and future of audio, Manley’s offering stands out as a quintessential choice.