C H A P T E R 4
Care and Maintenance of
your VTL preamplifier
Break In Period
Your VTL phono preamplifier is a pure tube product designed to give you the
continued optimum performance over a long time period. Initially the tubes and
circuits will require a burn-in period to reach maximum performance. During the first
100 hours of usage the preamplifier will undergo several improvements in sound.
Tube Life
Your VTL preamplifier has been designed to ensure long tube life. Tube replacement
need not be considered until after approximately 2000 hours of use (roughly 2 to 3
years depending on your listening requirements.) As the tubes age beyond their peak
performance there will be a general softening of the sound.
We recommend a complete replacement of all tubes in your preamplifier at that time,
which will restore it to a “like new” sound quality. Your VTL dealer or VTL factory
service department will be happy to assist you with the re-tubing process.
Note: use only tube types and tube brands that are recommended by VTL. VTL
specified replacement tubes are available from your authorized VTL dealer or the
VTL factory service department. Any damage incurred to units which use non-
VTL approved tubes will not be covered under the warranty.
Changing Tubes
Do not attempt to change tubes yourself unless you feel confident that you can do so
safely. Contact your authorized VTL dealer or the VTL factory service department if
you would like the service to be performed by a trained technician.
To change tubes in your preamplifier you must first turn the power
off
on the
preamplifier,
unplug
the unit from the wall outlet and disconnect the preamplifier
from the rest of your system. Using a Philips Star screw driver remove the cover
chassis from the unit by loosening the screws from each side of the preamplifier and
TP2.5 Preamplifier Owner’s Manual
VTL
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