40-4075.fm Page 1 Wednesday, August 11, 1999 10:33 AM
Cat. No. 40-4075
PRO SWS-250 Multimedia Amplified Speaker System
Your OPTIMUS PRO SWS-250 Multi-
media Amplified Speaker System with
SPEAKER PLACEMENT
subwoofer and satellite speakers is
designed to enhance your computer
multimedia system, or transform your
portable CD player, or personal cas-
sette player into a complete music
system. This amplified speaker sys-
tem is compatible with any audio
source with a 1/8-inch stereo head-
phone or LINE OUT jack.
Speaker location and position are vital
for the best sound performance.
Satellite Speakers
For the best stereo image, the dis-
tance between the satellite speakers
should be about the same as the dis-
tance from the main listening area to a
point halfway between the speakers.
The system’s 5-inch subwoofer and 3-
inch satellite speakers produce excel-
lent stereo and powerful bass sounds.
You can use the sound output from
your computer and CD or cassette
player at the same time, and you can
connect a microphone to the system
so you can use it as a PA or Karaoke
system.
(illus)
This symbol is intended to alert you
to the presence of uninsulated dan-
gerous voltage within the speaker
system’s enclosure that might be of
sufficient magnitude to constitute a
risk of electric shock. Do not open
the speaker system’s case.
Warning: To prevent fire or shock
hazard, do not expose this speaker
system to rain or moisture.
CAUTION
RISK OF ELECTRIC SHOCK.
!
DO NOT OPEN.
This symbol is intended to inform
you that important operating and
maintenance instructions are in-
cluded in the literature accompany-
ing this speaker system.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL.
!
© 1996 Tandy Corporation.
All Rights Reserved.
Optimus is a registered trademark used by Tandy Corporation.
RadioShack is a trademark used by Tandy Corporation.
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40-4075.fm Page 3 Wednesday, August 11, 1999 10:33 AM
• If you use the input source’s head-
phone jack, set the input source’s
volume control to its middle set-
ting.
(illus)
Then connect the cable’s other end to
the system’s Input B jack on the back
panel.
1
If you are not connecting the
Note:
Connect the Y-adapter cord’s /8-inch
1
system to a computer sound card, you
can use the supplied Y-adapter cord
between the portable audio source’s
LINE OUT or headphone jack and the
system’s R and L Input A phono jacks.
stereo plug to the /8-inch stereo out-
put jack on your computer’s sound
card. Then connect the Y-adapter
cord’s right (red) and left (white)
phono plugs to the system’s R (red)
and L (white) Input A phono jacks.
To the Audio Output of a
Portable or Home Stereo
System
(illus)
You can connect the system to a por-
table stereo source (such as a CD
player or cassette player) using a
shielded audio cable with a /8-inch
stereo plug at each end (such as Cat.
No. 42-2387, not supplied).
Or, using a shielded audio cable with
left and right phono plugs at each end
(such as Cat. No. 42-2356, not sup-
plied), you can connect the system
between your home audio source’s
right and left AUDIO OUT jacks and
the system’s R and L Input A phono
jacks.
1
(illus)
(illus)
Connect one end of the cable to the
input source’s 1/8-inch stereo LINE
OUT or headphone jack.
• If you use the input source’s LINE
OUT jack, the source’s volume
control has no effect.
3
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40-4075.fm Page 4 Wednesday, August 11, 1999 10:33 AM
To a Microphone
To Satellite Speakers
You can connect a microphone (not
supplied) directly to the MIC jack on
the front of the system.
(illus)
(illus)
Connect the left satellite speaker’s
wires to the system’s SATELLITE
SPEAKER L terminal (white to + and
black to –).
Notes:
Connect the right satellite speaker’s
wires to the system’s SATELLITE
SPEAKER R terminal (white to + and
black to –).
• The microphone signal is routed
from the MIC jack on the front
directly to the MIC jack on the
back of the system.
Note: For the best overall perfor-
mance, be sure you connect the satel-
lite speaker wires according to the
correct polarity (+ and –).
• For this connection to work, you
must also connect a shielded
audio cable with a /8-inch stereo
1
plug at each end (such as Cat.
No. 42-2387, not supplied)
between the MIC output jack on
the back of the system and the
MIC input jack on your computer’s
sound card (see “To the Micro-
phone Input of a Computer’s
Sound Card”).
To Headphones
For private listening, you can connect
a pair of stereo headphones with a /8-
inch plug (not supplied) to the
PHONES jack on the front of the sys-
tem.
1
(illus)
4
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40-4075.fm Page 5 Wednesday, August 11, 1999 10:33 AM
Notes:
having to access the back of your
computer.
• When you connect headphones,
the system automatically discon-
nects the subwoofer and satellite
speakers.
• Your local RadioShack store car-
ries a wide selection of stereo
headphones.
(illus)
Important Note: To protect your hear-
ing, follow these guidelines when you
use headphones.
Connect one end of the cable to the
MIC input jack on your computer’s
sound card. Then connect the other
• Set the system’s volume to the
lowest setting before you begin
listening. After you begin listening,
adjust the volume to a comfortable
level.
MIC
end of the cable to the
output jack
on the back of the system.
• Do not listen at extremely high
volume levels. Extended high-
volume listening can lead to per-
manent hearing loss.
To Standard AC
Plug the power cord into a standard
AC outlet.
• Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a
volume level that does not cause
discomfort might still damage your
hearing.
(illus)
To the Microphone Input of a
Computer’s Sound Card
You can connect the system to the mi-
crophone input of a computer’s sound
card using a shielded audio cable with
a
1/8-inch stereo plug at each end
(such as Cat. No. 42-2387, not sup-
plied). This makes it easy to connect
or disconnect a microphone without
5
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40-4075.fm Page 6 Wednesday, August 11, 1999 10:33 AM
OPERATION
MIC
Connect a microphone to the
jack,
or turn on the connected audio source
and adjust its volume level if neces-
sary, then follow these steps to oper-
ate the system.
1. Turn on the system’s power by
VOLUME OFF/MAX
rotating
clock-
wise until it clicks, then set it to a
comfortable listening level. The
power LED lights.
BASS MIN/MAX
2. Rotate
to select
the desired low or high frequency
sound.
BALANCE LEFT/RIGHT
3. Adjust
to
get the proper stereo image.
INPUT A
IN-
and
Note: The system’s
PUT B
jacks operate at the same time.
If you connect stereo audio sources to
both input jacks, you can mix the
sound by adjusting the volume con-
trols of the corresponding audio sourc-
es.
6
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40-4075.fm Page 7 Wednesday, August 11, 1999 10:33 AM
CARE AND MAINTENANCE
Your Optimus PRO SWS-250 Multimedia Amplified Speaker System is an example
of superior design and craftsmanship. The following suggestions will help you care
for the speaker system so you can enjoy it for years.
Keep the speakers dry. If they get wet, wipe them dry immediately. Liq-
uids might contain minerals that can corrode the electronic circuits.
Use and store the speakers only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices and
distort or melt plastic parts.
Handle the speakers gently and carefully. Dropping them can damage
the circuit boards and can cause the speakers to work improperly.
Keep the speakers away from dust and dirt, which can cause prema-
ture wear of parts.
Wipe the speakers with a damp cloth occasionally to keep them looking
CLEANER
new. Do not use harsh chemicals, cleaning solvents, or strong deter-
gents to clean the speakers.
Modifying or tampering with your speaker system’s internal components can cause
a malfunction and might invalidate its warranty and void your FCC authorization to
operate it. If your speaker system is not operating as it should, take it to your local
RadioShack store for assistance.
7
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40-4075.fm Page 8 Wednesday, August 11, 1999 10:33 AM
SPECIFICATIONS
Subwoofer
Satellite Speaker
Speaker Size
5-Inch
3-Inch
Output power/THD 10%
Impedance
15 W
5 W
4 ohm
4 ohm
Frequency Response
Dimensions (HWD)
50–350 Hz
141/8 ¥ 67/8 ¥ 911/16 in
(358 ¥ 175 ¥ 246 mm)
300–20,000 Hz
61/8 ¥ 45/16 ¥ 615/16 in
(156 ¥ 110 ¥ 176 mm)
SPL/1m/1w .......................................................................................................90 dB
Input Sensitivity .............................................................................................350 mV
Output Level (in W)............................................................................ 2v (1w, 4 ohm)
Power Supply ................................................................................... AC 120V 60Hz
System Weight....................................................................................26.5 lb (12 kg)
Specifications are typical; individual units might vary. Specifications are subject to
change and improve without notice.
RadioShack Limited Warranty
This product is warranted against defects for 90 days from date of purchase from RadioShack com-
pany-owned stores and authorized RadioShack franchisees and dealers. Within this period, we will
repair it without charge for parts and labor. Simply bring your RadioShack sales slip as proof of
purchase date to any RadioShack store. Warranty does not cover transportation costs. Nor does it
cover a product subjected to misuse or accidental damage.
EXCEPT AS PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY
IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN
LIMITED WARRANTIES CONTAINED HEREIN. Some states do not permit limitation or exclusion
of implied warranties; therefore, the aforesaid limitation(s) or exclusion(s) may not apply to the pur-
chaser.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
We Service What We Sell
10/95
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
6A6
Printed in Korea
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