Maintenance; Vacuum Tubes; Cleaning - Audio Research High Definition Reference 80S User Manual

Maintenance

Vacuum Tubes

It is recommended that you replace the
vacuum tubes of your Reference 80S
in sets. All of the tubes in your amplifier
have been matched to have similar oper-
ating characteristics, to provide the best
sound quality and reliability. In the event
you need to replace a single output tube,
please refer to the numbers written on the
silver base at the bottom of the vacuum
tube when placing an order. KT150 tubes
should be replaced at approximately
3000 hours. 6H30 tubes should be re-
placed before 4000 hours.
Servicing
Because of its careful design and exacting
standards of manufacture, your Reference
80S amplifier should normally require only
minimal maintenance to maintain its high
level of performance.
Should you need service, please contact
your authorized Audio Research dealer
or other qualified technician. Additional
questions regarding the operation,
maintenance or servicing of your
amplifier, please contact the Customer
Support Department of Audio Research
Corporation at service@audioresearch.
com or call 763-577-9700. You may
also initiate a service request by visiting
the Audio Research website (www.
audioresearch.com) and selecting 'Service
Repair' found under 'Support' at the top
right of the home page.
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Caution
Your Reference 80S preamplifier
contains sufficient levels of voltage and
current to be lethal. Do not tamper with
a component or part inside the unit.
Even with the power turned off, a charge
remains in the energy storage capacitors
for some time.

Cleaning

The Reference 80S uses one bottom-
cover-mounted ultra-quiet fan for forced
air cooling of internal components. Over
time, depending upon the environment
in which the Reference 80s is installed,
dust will build up inside the chassis that
may impede proper cooling, which could
reduce component life. Audio Research
therefore strongly recommends the
owner have the Reference 80S cleaned
of internal dust buildup either every two
years of operation, or when the vacuum
tube sets are replaced –whichever occurs
first. Please contact your authorized
Audio Research dealer, service center,
or service@audioresearch.com for
instructions and assistance with this
cleaning operation.