Operation; Front Panel Controls And Displays; Start-Up; Shut-Down - Audio Research FOUNDATION Series Manual

Operation

Front Panel Controls and Displays

POWER
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Operation

Start-Up

• Secure interconnects between the amplifier
and your preamplifier; attach speaker leads
to the appropriate output terminals.
• Attach supplied power cord to rear IEC
inlet of amplifier, and plug other end into
grounded A.C. power receptacle.
• Turn on preamp and all other components;
mute preamp output.
• Press VT80 SE front panel control switch.
Green power LED will light.
• The VT80 SE has an automatic 30 second
mute circuit which allows the amplifier to
stabilize before becoming active.
• Unmute preamplifier output, initiate
source component signal, and adjust gain
as appropriate.

Shut-Down

• Mute preamplifier output.
• Press VT80 SE front panel power switch.
• Turn off preamplifier and then the
associated input source components.
Note: When the VT80 SE is shut off,
avoid restarting the unit for a minimum of 5
minutes to allow the vacuum tubes to cool.

Hour Counter

An LCD hour meter of elapsed tube operating
time can be viewed on the back panel, located
next to the IEC power connector. This displays
accumulated hours of vacuum tube service
life. If the amplifier is unplugged from the
mains supply, the total accumulated hours
are retained. The hour counter may be reset
by inserting a small, pointed object in the
hole directly to the left of the LCD counter.
The KT150 power vacuum tubes in your VT80
SE have an average life span of approximately
2000 hours. The smaller 6H30 vacuum tubes
have a life span of approximately 4000
hours. Actual tube life will vary depending
on the frequency and manner of usage of the
amplifier.
Note: Once the hour counter has been
reset, the total accumulated hours cannot
be recalled.
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