Optimus Sts 150 Users Manual 40 4074

STS 150 to the manual d8e162f9-c1c5-4920-8350-3b4ee73a924e

2015-02-05

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40-4074.fm Page 1 Wednesday, August 11, 1999 10:28 AM

Cat. No.

40-4074

STS 150 Speaker System
Your Optimus STS 150 Speaker System has a 2-way acoustic suspension
design that utilizes an 8-inch specially
treated cone surrounded by rubber to
yield excellent low-end response and
tight, clean bass. A 1-inch mylar
tweeter diaphragm provides clear and
natural high-frequency sound reproduction.
The speaker cabinet is solid in construction and is finished in woodgrain
vinyl. The decorative grille is acoustically transparent.
Note: You need speaker wire (not
supplied) to connect your speaker.

Where and how you position each
STS-150 speaker has a great effect
on the overall performance of your
sound system.
For the best sound and stereo effect,
place the speakers so the distance
between them is about the same as
the distance between the listening
area and a point halfway between the
speakers.

b
a

a=b

SPEAKER PLACEMENT
Cautions:
• To prevent the cabinet from warping or discoloring, do not place the
speaker where it is exposed to
direct sunlight or excessive
humidity.
• Do not place the speaker where it
might be knocked over or hit by
falling objects.

If you place the speakers too far apart,
a sound “hole” could occur and you
might not get the proper stereo image
in the listening area. Compensate for
this by angling the speakers slightly in
toward the listening area.
If you place the speakers too close together, you could cancel out the stereo image and the sound might seem
to be monaural. Compensate for this
by angling the speakers slightly away
from the listening area.

© 1996 Tandy Corporation.
All Rights Reserved.
Optimus is a registered trademark used by Tandy Corporation
RadioShack is a trademark used by Tandy Corporation.

40-4074.fm Page 2 Wednesday, August 11, 1999 10:28 AM

For the maximum increase in bass response, place your speakers directly
on the floor and positioned against a
wall or in a corner.
To decrease the bass response, raise
your speakers off the floor or move
them away from the wall or corner.
Avoid placing your speakers on a surface that absorbs sound, such as thick
carpeting. We recommend you experiment to find the best setup for your
sound system.

CONNECTIONS
Cautions:
• Take care never to exceed the
speaker’s maximum power rating
(see “Specifications”).
• To avoid any damage to the
speaker or amplifier/receiver, turn
off the amplifier/receiver before
making connections.

• We recommend you use colorcoded or marked wire to help you
correctly connect the wire. Some
color-coded wires have a stripe
running down one side of the conductor’s insulation. Some marked
wires have ridges along one side
of the conductor’s insulation.
Follow these steps to connect each
speaker to your receiver/amplifier.
1. With the speakers placed in the
selected locations, route the
speaker wire from each speaker
to the receiver/amplifier.
2. Separate the conductors for a
length of about 2 inches on each
end.
3. Strip 1/2 inch of insulation from the
ends of each conductor, then twist
each end.
2 In

ch e

Notes:
• Use 18-gauge speaker wire for
distances up to 25 feet. For
greater distance, use 16-gauge
wire. Your local RadioShack store
has a wide selection of speaker
wire.

2

1

/2 Inch

s

40-4074.fm Page 3 Wednesday, August 11, 1999 10:28 AM

4. Press the right speaker’s red
(positive) terminal tab and insert
the marked conductor into the
opening, then release the tab.

MAINTENANCE
Your Optimus STS 150 Speaker System is an example of superior design
and craftsmanship. The following suggestions will help you care for the
speaker so you can enjoy it for years.
• Keep the speaker dry. If it gets
wet, wipe it dry immediately. Liquids contain minerals that can corrode electronic circuits.

Note: Improper phasing can
decrease bass sounds. Be sure to
connect speaker terminals in
proper phase (+ to + and – to –).
5. Press the right speaker’s black
(negative) terminal tab and insert
the other conductor into the opening, then release the tab.
6. Insert the other end of the marked
conductor into your receiver/
amplifier’s right positive terminal.
7. Connect the remaining conductor
to the receiver/amplifier’s right
negative terminal.
8. Repeat these steps for the left
speaker.

• Keep the speaker away from dust
and dirt, which can cause premature wear of parts.
• Occasionally wipe the cabinet with
a cloth dampened with furniture
polish to keep it looking new. Do
not use harsh chemicals, cleaning
solvents, or strong detergents to
clean the speaker cabinet.
• Use and store the speaker in normal temperature environments.
Temperature
extremes
can
shorten the life of electronic circuits.
Caution: Do not clean the speaker
with a vacuum cleaner. This might
permanently damage it. Clean the
speaker grille with a feather duster or
soft cloth.

3

40-4074.fm Page 4 Wednesday, August 11, 1999 10:28 AM

SPECIFICATIONS
Speaker Complement .............................................8-Inch High-Compliance Woofer
1-Inch Ferrofluid Cooled Tweeter
Impedance ......................................................................................Nominal 8 Ohms
Frequency Response .......................................................................... 65 Hz–18 kHz
Power Handling...................................................................................50 Watts RMS
Maximum Power ........................................................................................100 Watts
Sensitivity .......................................................................................... 89 dB @2.83 V
Dimensions (HWD) ...........................................................14 1/4 ¥ 10 9/16 ¥ 8 1/4 Inches
(35.5 ¥ 25.4 ¥ 21 cm)
Shipping Weight ................................................................................................ 11 lb
(4.9 kg)
Specifications are typical; individual units might vary. Specifications are subject to
change and improvement without notice.

RadioShack Limited Warranty
This product is warranted against defects for 5 years from date of purchase from RadioShack
company-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 purchaser.
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
7/96

Printed in the USA



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