Audio Research Definition DS450M, Руководство пользователя

Страница: 5 / 8

5
1 – XLR input connector, for balanced
connection
2 – Output binding posts, (+) and (-)
1 – Power line fuse holder
1 – Power line cord IEC connector for
removable
20A power cord (supplied)
2 – 12V remote start in and out jacks
1 – Switch for XLR or RCA input operation
IMPORTANT: Use the best available
speaker wires and interconnects. As your
system improves in resolution from the
addition of quality components, it
becomes increasingly important to
avoid the limitations of inferior system
interconnections.
It is important sonically that your entire
system be connected so that the audio
signal arriving at the speakers has
correct absolute polarity or phase (i.e. is
not inverted). Connect the black or (-)
speaker terminal to the wire that
connects to the (-) binding post on the
amplifier. Connect the red or (+)
speaker terminal to the wire that
connects to the (+) binding post on the
DS450M. Using the knurled black knob,
tighten the binding posts firmly to assure
good contact for best sonic results.
For bi-wired loudspeaker systems (i.e.
running separate wires to bass and
treble speaker terminals), simply repeat
the above instructions, taking care that
all connections have the same (+) or (-)
polarity.
AC POWER CONNECTIONS: It is essential
that the DS450M amplifier be connected
to a wall AC power receptacle, or a
similar heavy-duty source. If it is
connected to convenience receptacles
on preamplifiers, etc., the full sonic
capabilities of both the amplifier and
the preamplifier will be compromised.
The AC power source for the amplifier
should be capable of supplying 15
amperes for 100 or 120 volt units, or 8
amperes for 220 or 240 volt units.
For the very best performance on
domestic 100 or 120 volt circuits, the
DS450M should be connected to its own
AC power circuit branch protected by a
15 amp breaker. The preamplifier and
other audio equipment should be
connected to a different power circuit
and breaker. Avoid the use of extension
cords. If they must be used on a
temporary basis, use 14-gauge or
heavier cords.
The DS450M utilizes a compatible
grounding system that generally does
not require a ‘ground lifter’ adapter plug
on the AC power cord to minimize hum.
The power cord on your DS450M has a
standard three-prong grounding plug to
provide maximum safety when it is
connected to a grounded wall
receptacle. If there is any question
regarding the safety of grounding
procedures,
be certain to seek
competent help with the installation. Do
not substitute a lighter gauge power
cord for the one supplied with this unit.
If an electronic crossover or other AC
powered equipment is used with the
amplifier it may be necessary to use
‘ground lifter’ adapters on the power
plugs of that equipment to minimize
system hum. Generally, the lowest hum
is achieved when the only direct
connection between audio common
‘ground’ and true earth ground occurs
in the preamplifier, through its grounded
power cord. Other equipment in the
system should have some form of
isolation to prevent ground loops and
associated hum.
Single-Ended Operation
The single-ended input should be used
with a preamplifier (or electronic
crossover, etc.) having single- ended
outputs which does
not invert overall
phase or polarity. When using single-
ended input, set the rear-panel toggle
to SE position. Disconnect any balanced
cable.
Balanced Operation
The balanced input can be used with a
preamplifier (or electronic crossover,
etc.) having balanced outputs. When
using the balanced input, set the rear
panel toggle to BAL position. Disconnect
any single ended cable.