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PAGE 01
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!
Chapter 1 PRECAUTIONS: