I
NSTALLATION
As is the case with any vacuum-tube power amplifier, the MV60 dissi-
pates a significant amount of heat. Provision must be made for ade-
quate ventilation. Mount the unit on a flat, hard surface, taking care that
the ventilation holes in the bottom are unobstructed. Maintain at least
four inches of clearance above the unit, and at least three inches on
the sides. The cabinet or shelf should be open at both front and back.
For more restricted installations, cooling fans are essential.
The MV60 is supplied with a cover for the vacuum-tubes, which can be
secured by the two captive screws inside the cover. The cover provides
protection from the hot surfaces of the vacuum-tubes. It should always
be used in installations where there is any possibility that children or
pets may come near the amplifier.
All MV60s sold in the United States are configured for operation on a
60Hz ac power line producing between 108 and 126 volts. Export
versions of the MV60 will have the correct operating voltage and fre-
quency clearly marked on the back panel of the unit, near the ac power
cord. In all cases, the actual line voltage should be within + 5/- 10% of
the nominal rated voltage.
Electromagnetic Interference (EMI)
Considerable care has been taken in the design of the MV60 to mini-
mize it’s susceptibility to radio frequency interference and other forms of
EMI. Choice of materials, physical layout, grounding practice, and
power supply design have all been specified with a view to reducing the
impact of electromagnetic fields on the performance of this unit. At the
same time, however, our primary goal is the accurate reproduction of
recorded music in the normal home environment, and we have elected
not to compromise this objective by the application of heavy-handed RFI
filters, or by using grounding practices that reduce RFI at the expense
of degraded audio performance. We find that the approach we have
taken has worked extremely well, resulting in only rare instances of EMI
problems which could be treated locally as needed, rather than compro-
mising the performance of our product in the 99.9% of installations
where EMI is not a problem.
MV60 Owner’s Manual 5
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