Audio Research Reference 600 Bedienungsanleitung Seite 6

Model Reference
Ncie: For easiest access, install the lowest rows of small-
er tubes first, working upward to the top rows of larger
tubes on each circuit board.
3. Once all the vacuum tubes have been installed, reposi-
tion the top and rear coversand reinstall the screws.
Note: In general, contact enhancers are not recommended
for use on vacuum tube contact pins. With continual expo-
sure to heat and air, many of these substances can form
gummy. dust-collecting residueswhich actually reduce con-
tact and degrade sonic performance. Properexternal use of
thesepreparations —on interconnect plugs, speakerconnec-
—is subject to the discretion of the owner.
tions, etc.
Contact Audio Researchfor specific recommendations.
Front Panel Controls/Displays
— Line voltage operating range meter
I — Power output and tube operating range meter
16 — Cathodecurrent bias adjustment potentiometers
(ill-v16)
I — Power switch with "Off", "Standby" and "Operate"
positions
I —Fan speedcontrol
I — Meter illumination control
I —VI-V8 and V9-V 16 tube test selector switch with
"Pwr Out" operating position
2 — 8-position meter indication switches for V I-V8 and
V9-V16 individual tube operating rangeadjustment
I —"Standby" status LED (amber)
I —"Operate" status LED (green)
Installation
To insure normal component life and safe operation this
unit must be operated only in a horizontal (upright) posi-
tion. Adequate air flow and proper cooling thereby can
occur only if there is no restriction below, behind and
above the unit.
The special non-marring elastomer feet provide adequate
spacing only from a smooth, hard surface. Never operate
the unit while it is sitting on a surface such as a rug or
carpet.
If the unit is to be operated in an enclosure such as an
equipment rack, make certain that adequateair flow above
and below the unit is provided. The "ambient" operating
temperature should never exceed 1200F or 490C. Audio
Research Corporation Rack Mount Ventilators (RMV-3)
must be used aboveand below eachunit. Improper installa-
tion will causepremature tube failure and will affect your
warranty, as well as the servicelife of the unit.
2
600
It is normal for a vacuumtube power amplifier to run quite
"warm", and if used for prolonged periods. "hot" to the
touch. All components within are, however, operatedat
safe.conservative levelsand will not be improperlyaffected
thereby, providing the requirements outlined above are
adhered
Rear Panel Connections
The rear panel has:
I — Power cord
1 —Fuse post
7 —Output binding postsfor various output
impedances
I —XLR balancedinput connector
Connection
The amplifier should always be turned on and off via its
own power on-off switch, Becauseof the very high energy
storage within this amplifier, special warm-up circuitry is
provided which gets its sequencingfrom its own power on-
off switch. Further, other discrete components of an audio
system should be turned on first. Otherwise, with some
equipment, the amplifier will reproduce warm-up thumps,
etc., some of which could be harmful to your speakersys-
tem. ARC preamplifiers have automatic warm-up muting.
and are much less likely to exhibit this problem: however.
good operating practice says "Turn the amplifier on last,
and turn
The Reference 600 input is "balanced" and therefore
requires a preamplifier with a balanced output, or the
addition
between a single-ended output preamplifier and the input
of the Reference
Pairs of ARCs proprietary and non-twisting output connec-
tors are employed for each impedance. Simply observe the
legend,connectingyour speakersto the appropriateset of
binding posts for their rated impedance. Connect the
"negative" speakerlead to the "balanced" 4, 8 or 16 ohm (-)
post; and the "positive"speakerlead to the (+) post directly
above.
IMPORTANT: Use the best available speakerwires and in-
terconnects. As better components and systems are devel-
oped, it becomesincreasingly important to avoid the limita-
tions of inferior system interconnections. For best results
we recommend
and LitzLine 2@speakercables.
to.
Instructions
it off first. "
of an Audio Research BLI
600.
Audio Research LitzLink
Balanced Line Driver
20 interconnects