4
Preface
Please take time to carefully read and
understand the following instructions
before you install or attempt to operate
this equipment. Becoming familiar with
the product and its correct operating
procedures will help assure you of
maximum musical enjoyment and
reliable operation. The effort you invest
now will be well rewarded in the years
ahead.
Warnings
1. DO NOT POWER ‘ON’
THIS AMPLIFIER WITHOUT
INPUTS OR SPEAKER LOAD
CONNECTED TO IT.
2.
To prevent fire or shock hazard, do
not expose this product to rain or
moisture.
3.
This unit operates on voltages which
can cause serious injury or death. Do
not operate with covers removed. Any
necessary servicing should be carried
out by your authorized Audio Research
dealer or other qualified personnel.
4.
The 12-gauge, 3-conductor power
cord on this unit is equipped with a
standard 3-prong grounding plug. If
used normally, it will provide a safe
earth ground connection of the
chassis. Refer to section on ‘AC Power
Connections’ for detailed information.
5
. For safe operation and protection
against fire hazard, replace fuses only
with those of the same type and rating
of fuses as specified.
Packaging
Save all packaging accompanying this
product. You have purchased a
precision electronic instrument, and it
should be properly cartoned any time
shipment becomes necessary. It is very
possible that this unit could be
damaged
during
shipment
if
repackaged in cartoning other than
that designed for it. The original
packaging materials help protect your
investment from unnecessary damage,
delay and added expense whenever
shipment of this unit is required.
Unpacking
The DS450M is packed within two
cartons (inner and outer) which have
foam supports in between. Because of
the weight of the unit and because it is
a precision electronic instrument it is
necessary to take reasonable care
during unpacking and preparation for
use. It is best to have a large, open work
area with available help. Set the carton
upright in the center of the work area
and with a small knife carefully slit the
taped edges of the outer carton's top
flaps. Fold the flaps to the sides and
while holding the inner carton in place,
roll the unit upside down. You can now
lift the outer carton off and set it and the
filler panels aside. Now slit the inner
carton's taped seams on the bottom
(now facing upward). Again, fold the
flaps over and while holding the unit in,
roll it over as before. You can now lift the
inner carton off to find your DS450M
sitting
upright,
undamaged
and
uncartoned. Carefully remove the
plastic wrap. Now, while it is fresh in your
mind, reassemble the carton system for
future use.
Accessories
Spare Line Fuses:
2 – 6 Amp MDA slo-blo (100 & 120V)
2 – T3.2A Amp Super-Time-Lag TT (220 -
240V)
Description of Controls
The front panel has:
1 Power line On-Off switch
1 Power ‘On’ LED (Green) indicator
POWER ON-OFF SWITCH:
Press the power
switch to initiate or terminate AC line
power to the amplifier. When the LED is
illuminated the amp is ‘on’ and ready to
play.
Connections
The rear panel has:
1 – RCA input connector, for single-
ended connection
Summary of Contents for Definition DS450M
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