CHAPTER 4
Care and Maintenance of
your VTL preamplifier
Break In Period
Your VTL 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. To break in
the preamplifier you can leave it on with a music source connected to it and playing
with the volume control turned to the ½ level. It is not necessary to have the power
amplifier on during this break in period, as the preamplifier will still pass the signal.
Tube Life
Your VTL preamplifier has been designed to ensure long tube life. Tube replacement
need not be considered until after approximately 5000 hours of use (roughly 4 to 5
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.
TL2.5 Preamplifier Owner’s Manual
VTL
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