Chapter 1 PRECAUTIONS:

Your Mesa Engineering amplifier is a professional instrument. Please treat it with respect and operate it properly.

USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS:

Do not expose amplifier to moisture, rain or water, direct sunlight or extremely high temperatures.

Always insure that amplifier is properly grounded.

Always unplug A.C. power cord before changing fuse or any tubes.

When replacing fuse, only use same type and rating.

Avoid direct contact with heated tubes.

When handling tubes, use gloves or a paper towel to prevent getting oils from your skin in contact with the tube’s glass envelope. This could cause premature tube failure.

Insure adequate air circulation around your amplifier.

Use tube cage in the presence of small children and animals.

Be sure to connect to an A.C. power supply that meets the power supply specifications listed on the rear of the unit. This is especially important if you use your amplifier in a country other than the USA. Check that the voltage indicated on the rear chassis matches that of your country’s line voltage.

If there is any danger of lightning occuring nearby, remove the power plug from the wall socket in advance.

To avoid damage to your speakers and other playback equipment, turn off power to all related components before making any connections.

Do not use excessive force in handling control buttons and switches.

Remove the power plug from the A.C. mains socket if the unit is to be stored for an extended period of time.

Do not use solvents such as benzene or paint thinner to clean the unit. Wipe off the exterior with soft cloth.

Do not remove rubber feet. This would restrict air flow underneath the amplifier and could result in damage due to overheating.

Do not install in enclosed space unless proper ventilation is provided.

In the unlikely event of massive tube failure (arcing and lightning inside the glass envelop), immediately turn off power and disconnect power cord.

Do not remove any chassis parts to get inside your amplifier. There are no user-serviceable parts inside. Tube amplifiers operate with very high voltage. Unskilled repair attempts could result in serious injury. Leave repairs to qualified technicians.

YOUR AMPLIFIER IS CAPABLE OF VERY HIGH VOLUMES. EXPOSURE TO EXCESSIVE PLAYBACK LEVELS CAN

RESULT IN PERMANENT HEARING DAMAGE. THIS IS ESPECIALLY TRUE FOR HEADPHONE LISTENING!

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Mesa/Boogie Vacuum Tube Audio owner manual USE Common Sense and Always Observe These Precautions

Vacuum Tube Audio specifications

Mesa/Boogie is a revered name in the world of vacuum tube audio, renowned for its high-quality amplifiers that have shaped the sound of modern music. Founded in 1969 by Randy Smith in California, Mesa/Boogie began by transforming Fender amplifiers into customized, high-gain models, ultimately gaining a reputation for producing powerful, versatile, and low-noise amplifiers. The signature sound of Mesa/Boogie is characterized by a complex harmonic richness, warmth, and clarity that resonates with guitarists and audiophiles alike.

One of the standout features of Mesa/Boogie amplifiers is their all-tube design. Utilizing vacuum tubes as the primary amplification source, these amps deliver a dynamic range and tonal complexity that solid-state amplifiers struggle to match. The quality of the tubes used, often hand-picked or specifically designed by Mesa, contributes to the unique audio characteristics of each model. The use of EL34, 6L6, and 12AX7 tubes in various configurations allows for a range of tonal options, from lush cleans to searing leads.

Mesa/Boogie amplifiers are also distinguished by their innovative technologies. The brand pioneered the dual rectifier system, which allows players to switch between tube and solid-state rectification. This feature gives musicians the ability to tailor their sound to preference, enhancing the responsiveness and feel of the amplifier. The Contour controls found on many models further exemplify Mesa’s commitment to versatility, allowing for fine-tuning of EQ settings that adapt to different musical styles.

Another hallmark of Mesa/Boogie designs is their attention to build quality. Each amplifier is crafted with robust materials, ensuring durability and reliability even in demanding performance environments. The custom cabinets and speaker selections are optimized to complement the amplified tone, providing a cohesive sound that resonates in live settings.

Mesa/Boogie’s reputation is enhanced by their extensive lineup, including the Mark series, the Rectifier series, and the Lone Star series. Each line caters to different playing preferences and styles, from jazz to metal. The versatility of these amplifiers makes them suitable for diverse genres, allowing musicians to explore their sonic identities.

In conclusion, Mesa/Boogie remains a leading force in vacuum tube audio, combining traditional craftsmanship with cutting-edge technology. Their dedication to quality, innovation, and tonal versatility ensures that they remain a favorite among guitarists seeking the ultimate sound experience. Whether in the studio or on stage, Mesa/Boogie amplifiers continue to inspire musicians to push the boundaries of creativity.