Location and Ventilation
Install this amplifier in a location which is stable and well ventilated. If the amplifier is placed in a
built-in installation, ensure that there is adequate room for a supply of air to flow through the
ventilation openings. Allow at least 9 inches clearance on the top and around the sides of the
amplifier. Be sure the amplifier is at least 10 inches away from your preamplifier to prevent possible
noise introduction into your system. Tiptoes or other isolation accessories may prove useful in reducing
mechanical vibrations.
Do not place amplifiers directly on high pile carpets as this will block the
ventilation vents
. Do not place the amplifier next to heat sources such as radiators, stoves or other appliances.
Do not place amplifier on the floor where small children can tamper with the equipment. If it is not possible
to place amplifier out of the reach of small children it is recommended that you remove power cables when the
equipment is not in use.
Servicing
Do not attempt to service the amplifier beyond the procedures described in this manual. For all other service
and questions, please contact your authorized VTL dealer or the factory.
Operational Warnings
Do not touch the tubes after the amplifier is turned on
. Tubes can get very hot while the amplifiers
are operating. Turn off the amplifier and allow the tubes to cool down before attempting to work with the
tubes.
Do not attempt to disassemble the amplifier chassis or remove any covers from the amplifier.
Always consult with your VTL authorized dealer or the VTL factory support department before
attempting any service work on any VTL unit.
Always connect your loudspeaker to the amplifier before powering the unit on. Operating any VTL power
amplifiers without a speaker load connected can damage the output transformer, and will not be covered
under the warranty. Also, ensure that no speaker cables can become loose during use and that there are no
intermittent faults with the cables.
Tube amplifiers can be heavy and awkward to lift, with the weight unevenly distributed, and you should
not attempt to move the unit without help. Each unit of the MB-125 monoblock weighs approximately
50
lbs
(
22 Kg)
.
Do not attempt to make or break any connections to the amplifier while the unit is powered on as this can
damage the amplifier and/or the rest of the system, and this damage is not covered by warranty.
Do not flip the triode tetrode switches while the unit is powered on, as this can damage the switch and is
not covered under warranty.
Do not exceed fuse ratings or attempt to bypass any fuses, as this can cause an extremely hazardous
condition and will void any warrantees. Use only the same type and rating of fuses as specified in the
owners manual and marked on the unit.
MB-125 Owner’s Manual
VTL
2
