Audio Research Reference 250 SE, Руководство пользователя

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13
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 Reference 250 SE front panel control
switch. Green power LED will light.
• The Reference 250 SE has an automatic
mute circuit which lasts approximately
45 seconds to allows the amplifier to
stabilize voltage before becoming active.
• Unmute preamplifier output,
initiate source component signal,
and adjust gain as appropriate.
Shut-Down
• Mute preamplifier output.
• Turn off Reference 250 SE front
panel power switch.
• Turn off preamplifier and then the
associated input source components.
Display Brightness Adjustment
The front panel meter display is illuminated
with ultra low-noise, low voltage LED
lighting which has no impact on sound
quality when turned on. The display
brightness has three settings: high, low,
and off. To change the brightness of the
display, locate the front panel button
labeled ‘Light’. Press this button to toggle
through the three available settings.
Fan
Press the fan switch to select low
(dim Power LED) or high (bright
Power LED) for fan speed setting.
Meter
Press meter button to turn on or off the
power level monitoring meter function.
Note
The light, fan, and meter settings
at turn off are retained each time
the amplifier is turned on.
Break-in
All quality stereo equipment benefits from
a break-in period; during this time, the
various components, wiring and solder
connections change as electrical signals
pass through them. While your Reference
250 SE will sound fantastic out of the box,
it will only improve with continued use.
Important!
After the Reference 250 SE is turned
off, wait at least five minutes before
turning it on again. This allows the large
bank of storage capacitors to drain
energy. Not allowing enough time for
this process can result in blown fuses
or other damage to your amplifier.
Operation