Audio Research DS225 Owner's manual - page 4
Preface
Please take time to carefully read and understand the fol-
lowing 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 maxi-
mum 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 WITH-
OUT 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 cov-
ers removed. Any necessary servicing should be
carried out by your authorized Audio Research
dealer or other qualified personnel.
4. The 14-gauge, 3-conductor power cord on this
u n i t i s e q u i p p e d w i t h a s t a n d a r d 3 - p r o n g
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 ship-
ment becomes necessary. It is very possible that this
unit could be damaged during shipment if repack-
aged 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 DS225 is packed within two cartons (inner and
outer) which have foam supports in between. Be-
cause of the weight of the unit and because it is a
precision electronic instrument it is necessary to
take reasonable care during unpacking and prepa-
ration 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 DS225 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 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 amplifi-
er. When the LED is illuminated the amp is “on” and
ready to play.
Connections
The rear panel has:
2 – RCA input connectors, for single-ended
connections, L & R
2 – XLR input connectors, for balanced connection,
L & R
4 – Output binding posts, (+) and (-), L & R
1 – Power line fuseholder
1 – Power line cord 15A IEC connector for remov-
able power cord (supplied)
2 – 12V remote start in and out jacks
2 – Switches for XLR or RCA input operation, L & R
IMPORTANT: Use the best available speaker wires
and interconnects. As your system improves in reso-
lution from the addition of quality components, it
becomes increasingly important to avoid the limita-
tions 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 ter-
minal to the wire that connects to the appropriate-
Model DS225
1