Acoustic Research arpr1212 用户指南

Your Acoustic Research Subwoofer delivers powerful, deep bass sound
output for a natural, life-like sonic experience.  Please follow the direc-
tions in this manual to achieve the best performance from your system.

The hook-up and operation of the Subwoofer is the same for a Home
Theater surround sound system or a stereo music system.  The
Subwoofer has its own built-in amplifier, so it works with any sound 
system.  The Subwoofer’s own crossover network sends bass-only 
signals to the Subwoofer’s built-in amplifier.  This lets the Subwoofer add
extra bass to the output from your other speakers.

For simplicity, we call your Home Theater system’s or music system’s
main speakers the Front speakers.  We call your AV receiver, stereo
receiver, or integrated amplifier the Receiver.

Your Acoustic Research Subwoofer must sit on the floor, in a corner to
work properly.  The floor and corner are actually a part of the Subwoofer’s
design. Your AR subwoofer should be placed on the floor.You should be
aware that the closer the subwoofer is placed to the wall,the more pro-
nounced the bass will become,with maximum bass being achieved with
the subwoofer being placed in a corner.

To optimize you system's electronic components,try and keep all speaker
wire and cables as short as possible.

POWER CORD  Plug the power cord into an
AC wall outlet or other AC outlet capable of
supplying at least 400 Watts.

POWER SWITCH  Turns the AC supply com-
pletely OFF or sets the Subwoofer to AUTO ON
operation.  In AUTO ON, the Subwoofer is in
standby mode until it detects an audio signal
input, then the Subwoofer turns on automati-
cally.  A few minutes after audio input signals
cease, the Subwoofer automatically returns to
standby mode.

POWER INDICATOR LED Your AR Subwoofer
has 2 LED indicators. The Power LED indicator
is located on the amplifier on the rear. This
LED is unlit when the AC power switch is OFF.
It glows red when the Subwoofer is in standby
mode and green when the Subwoofer is on.
The Signal indicator LED is Blue and is located
next to the AR logo on the front of the sub-
woofer. This LED is lit when there is an audio
signal present.

FUSE 250V 4A This fuse protects against
internal and external faults.  If the POWER
switch is ON and the power indicator LED is

unlit, unplug the power cord from the AC outlet and check the fuse by
unscrewing the center piece from the holder.  IMPORTANT If the fuse is
blown, replace it only with a fuse of the same type and current rating.

L, R SPEAKER-IN and OUT  TERMINALS - See Connection Option 1
These terminals are for making connections using speaker wire.  If you
use this option, do not use Option 2.

L,R Line In and Out Jacks - See Connection Option 2
These jacks are for input and output connections uing audio cables.If
you use this option,do not use Option 1.

LFE INPUT JACK Allows direct connection from an amplifier/proces-
sor with an internal low pass filter.This connection bypasses the sub-
woofer's internal crossover circuitry.Use only with appropriate Suround
Sound processor/amplifier.

LFE Output Jack This connector is connected internally to the LFE input
jack and allows you to loop the LFE input signal out to another LFE input
on an additional AR powered loudspeaker or subwoofer.

LOW PASS FREQUENCY CONTROL  Adjusts the upper frequency limit
for audio signals going to the Subwoofer amplifier.  This control helps
you adjust the systems tonal balance.

LEVEL CONTROL  Balances the loudness of the Subwoofer relative to
the Front speakers and compensates for room effects on the Subwoofer’s
output.

PHASE SWITCH The Phase Switch controls the phase of the
Subwoofer’s output relative to the front speakers.  Listen carefully to the
sound quality while playing a CD with low bass.  Select the position of
the switch that produces the fullest deep bass without boominess.  You
may need to readjust the Level and Low Pass Frequency controls after
setting the Phase Switch.

IMPORTANT  When you make connections. make sure that the power
switches of all components, including the Subwoofer, are OFF.

AUDIO CABLES If you are connecting the Subwoofer into a system
made up of separate components (preamp & power amps), you will need
audio cables long enough to reach the Subwoofer from the preamplifier
and the power amplifier.

SPEAKER WIRE Typical speaker wire has a pair of separate conductors
with insulating jackets that are molded together.  We recommend that
you use 16-gauge speaker wire for hooking your Receiver to your Front
speakers.  To make connections to the Subwoofer in parallel with the
Front speakers easier, the speaker wire connecting the Receiver to the
Subwoofer can be smaller (higher gauge number), since the Subwoofer
does not draw large amounts of power through these wires.

POLARITY  All speakers in a system must be connected with the same
polarity.  Speaker wire is marked for polarity so that you can identify
which wire in the pair is which.  Polarity is shown by a color strip on the
insulation, by ridged molded into the insulation, or by the colors of the
wires - one copper and one silver.

Strip the insulation from speaker wire ends to reveal the bare conductors
before connecting to Receiver, Subwoofer or Speaker terminals.

IMPORTANT  Always connect the red + terminal on the Receiver to the
red + terminal on the Subwoofer, and the black - terminal on the Receiver
to the black - terminal on the Subwoofer.  The same is true for hooking
the Receiver outputs to the Front speakers: red + to red +, and black- to
black-.

°

°

RECEIVER

SUBWOOFER

SPEAKER 

LEVEL

SPEAKERS

IN

OUT

+

+

–

–

+

+

–

–

+

–

   L      R

SPK OUT
   L      R

-TO BLACK TERMINAL 
(plain or silver)

+TO RED TERMINAL 
(color stripe ridges 
or cooper)

3/8” (9mm)
BARE WIRE