32-1168.fm Page 1 Thursday, January 20, 2000 11:32 AM
Cat. No. 32-1168
OWNER’S MANUAL
Please read before using this equipment.
Karaoke with Voice Canceller
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32-1168.fm Page 3 Thursday, January 20, 2000 11:32 AM
CONTENTS
Connections ............................................................................................................ 4
Connecting Microphones .................................................................................... 4
Connecting to an Audio Source .......................................................................... 4
Connecting to an Audio Output Component ....................................................... 5
Connecting Power .............................................................................................. 5
Installing Batteries ....................................................................................... 5
Using AC Power .......................................................................................... 6
Singing Along ......................................................................................................... 7
Controls .............................................................................................................. 7
Operation ............................................................................................................ 7
Care and Maintenance ............................................................................................ 9
The FCC Wants You to Know ........................................................................... 10
Specifications ....................................................................................................... 11
3
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32-1168.fm Page 4 Thursday, January 20, 2000 11:32 AM
CONNECTIONS
To avoid electrical shock, do
not connect the system to AC power un-
til all other connections are complete.
Caution:
CONNECTING TO AN
AUDIO SOURCE
You must connect an audio source
(such as a CD player or stereo system)
to the karaoke system, so you can sing
along with the music.
CONNECTING
MICROPHONES
The system has two microphone jacks
so you can use the supplied microphone
to sing along to your favorite recordings,
and connect an additional microphone
for duets or lead and background vocals.
Connect the audio source’s stereo out-
put jacks to the karaoke system’s
or
CD
and jacks, according to the
TAPE IN R
L
type of audio source, using the supplied
cable. Use the white plug for the left
connection and the red plug for the right
connection.
The additional microphone must have a
1/4-inch plug and an ON/OFF switch. To
help prevent feedback, we recommend a
R
OUT
IN
L
L
CD
B
.
DC 6V
•
R
unidirectional microphone. (
RadioShack
TAPE
MAX. 50mA
.)
carries a wide variety of microphones
Audio Source Jacks
To connect either one or two micro-
phones, first rotate the and
volume controls counterclockwise to
You can connect the karaoke to
Note:
MIC 1
MIC 2
both a CD and a tape audio source at
the same time. However, the karaoke
only plays one source at a time. (See
“Controls” on Page 7.)
.
MIN
MIN
MIN
MAX
MAX
If the audio source does not have AUX
OUT jacks, but has a headphone output
jack (such as is often found on a porta-
ble tape player or CD player), use a
shielded Y-adapter to connect it to the
karaoke. (RadioShack carries a wide va-
riety of Y-adapters.) Connect the Y-
adapter’s single-plug end to the audio
source’s headphone jack, and connect
the Y-adapter’s two phono plugs to the
MIC
2
MIC
1
If you connect only one microphone,
plug it into the jack
directly in front of the
If you add a sec-
volume control.
MIC 1
ond microphone, plug it
rectly in front of the
control.
into the jack di-
volume
MIC 2
karaoke’s
or
and jacks.
TAPE IN R
CD
L
If you connect a second audio source,
you need an additional audio patch ca-
ble. (RadioShack carries a wide variety
of audio cables.)
M
IC
1
M
IC
2
Microphone Jacks
4
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32-1168.fm Page 5 Thursday, January 20, 2000 11:32 AM
Installing Batteries
CONNECTING TO AN
AUDIO OUTPUT
COMPONENT
You can power the karaoke system with
four AA batteries (not supplied). For the
longest life and best performance, we
recommend RadioShack alkaline batter-
ies.
To hear the music along with your voice,
connect your stereo amplifier/receiver to
OUT L
R
the karaoke’s
and jacks using
the supplied cable. Use the white plug
for the left connection and the red plug
for the right connection at both ends of
the cable.
Cautions:
• Use only fresh batteries of the
required size and recommended
type.
R
OUT
IN
L
L
• Do not mix old and new batteries,
different types of batteries (stan-
dard, alkaline, or rechargeable), or
rechargeable batteries of different
capacities.
B
CD
.
DC 6V
•
R
TAPE
MAX. 50mA
Audio Output Jacks
Note:
If you turn off the karaoke, the
sound from the audio source still passes
through the karaoke to the audio output
component unaffected until you turn off
the source and/or the output compo-
nents.
Follow these steps to install the batter-
ies.
ECHO
1. Rotate
POWER
counterclockwise to-
until it clicks to turn it
ward
.
off
Caution:
If you connect the karaoke’s
POWER
input and output to the same audio com-
ponent (like a tape deck monitor circuit
in a receiver), the karaoke cannot isolate
the ground to the input jacks. This caus-
es the right channel to short to ground
and feed the left channel to both the left
and right outputs.
ECHO
2. Press on the battery compartment
cover on the bottom of the karaoke
and slide it in the direction of the
arrow to remove it.
CONNECTING POWER
You can power your karaoke system us-
ing one of the following power sources.
• four AA batteries
• AC power
5
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32-1168.fm Page 6 Thursday, January 20, 2000 11:32 AM
3. Install the batteries as indicated by
the polarity symbols (+ and –)
marked inside the compartment.
karaoke’s DC 6V jack. Using an
adapter that does not meet these
specifications could damage the
karaoke or the adapter.
• Always connect the AC adapter to
the karaoke before you connect it to
AC power. When you finish, discon-
nect the adapter from AC power be-
fore you disconnect it from the
karaoke.
+
+
+
+
4. Replace the battery compartment
cover.
Note: Connecting an AC adapter dis-
connects internal batteries.
If the ON/OFF indicator dims, replace the
batteries.
1. Rotate ECHO counterclockwise to-
ward POWER until it clicks to turn it
off.
Warning: Dispose of old batteries
promptly and properly. Do not burn or
bury them.
POWER
Cautions:
• Always remove old or weak batter-
ies. Batteries can leak chemicals
that can destroy electronic parts.
ECHO
2. Insert the size
M
Adaptaplug
• If you do not plan to use the karaoke
system with batteries for several
days, or if you plan to use only AC
power, remove the batteries.
adapter into the AC adapter’s cord
so it reads TIP+ (positive).
3. Insert the adapter’s barrel plug into
the karaoke’s DC 6V jack.
R
OUT
IN
L
Using AC Power
L
B
CD
.
DC 6V
•
R
TAPE
MAX. 50mA
You can power your karaoke using a 6V
AC adapter and a size M Adaptaplug®
adapter (neither supplied). Both are
available at your local RadioShack store.
DC 6V Jack
4. Plug the AC adapter into a standard
AC outlet.
Cautions:
You must use a Class 2
power source that supplies
!
6V DC and delivers at least
50 mA. Its center tip must be set to
positive and its plug must fit the
6
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32-1168.fm Page 7 Thursday, January 20, 2000 11:32 AM
SINGING ALONG
Echo Control — To set the amount of
echo in your voice as you sing along,
adjust ECHO between its minimum and
maximum settings.
CONTROLS
Now get ready for some fun! Use the CD
or tape button to select the audio
source. Then set the voice canceller but-
ton and adjust the echo control to get
the sound just right.
POWER
Minimum
Setting
Maximum
Setting
ECHO
TAPE
VOICE REDUCTION
CD
OPERATION
CD or Tape Button
Voice Canceller
Button
Warning: To protect your hearing, set
the audio output component’s volume to
its minimum position before you turn it
on.
Voice Canceller Button — Press the
voice canceller button to reduce the vol-
ume of the prerecorded singer’s voice
as you play music from your audio
source. The VOICE REDUCTION indi-
cator lights.
Follow these steps to sing along with the
audio input source.
1. To turn on the karaoke, turn ECHO
clockwise until it clicks and the
POWER indicator lights.
Note: The voice cancelling feature re-
duces the level of signals that are re-
corded at the same level on both the left
and right channels. Its effectiveness var-
ies, depending on the music source. For
example, it does not work well with mon-
aural recordings or broadcasts, record-
ings or broadcasts with strong echoes,
stereo recordings with material originally
recorded in monaural, or vocals record-
ed off center. Also, if a musical instru-
ment was recorded in the mid-frequency
range, its sound level might decrease
along with the vocals.
2. Turn on the audio source and the
audio output component. You hear
the audio source’s sound through
the audio output component. Set the
audio output component’s volume
control to a comfortable listening
level.
3. Press the CD or TAPE button
according to the audio source you
want to sing along with.
4. Set each connected
microphone’s ON/OFF
switch to ON. Sing
directly into the micro-
phone along with the
music.
CD or Tape Button — To sing along
with a CD, press the CD or tape button
until the CD indicator lights. To sing
along with a tape, press the button again
until the TAPE indicator lights.
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32-1168.fm Page 8 Thursday, January 20, 2000 11:32 AM
5. Use MIC 1 and/or MIC 2 to adjust the
volume of each microphone.
Note: To avoid feedback, keep the
microphone away from the speakers
and the other microphone.
6. Press the voice canceller button to
reduce the prerecorded voice’s
sound.
for the desired rever-
7. Rotate ECHO
beration
.
8. When you finish, rotate ECHO coun-
terclockwise until it clicks to turn off
the karaoke.
9. Turn off the audio source and the
audio output components.
Notes:
• The voice canceller button works
with the karaoke’s power on or off.
However, if the power is off, the
VOICE REDUCTION indicator does
not light.
• For MIC 1, MIC 2, and ECHO to oper-
ate, the karaoke’s power must be
on.
8
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32-1168.fm Page 9 Thursday, January 20, 2000 11:32 AM
CARE AND MAINTENANCE
Your Optimus Karaoke is an example of superior design and craftsmanship. The fol-
lowing suggestions will help you care for your karaoke so you can enjoy it for years.
Keep the karaoke dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Use and store the karaoke only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices, dam-
age batteries, and distort or melt plastic parts.
Keep the karaoke away from dust and dirt, which can cause premature
wear of parts.
Handle the karaoke gently and carefully. Dropping it can damage circuit
boards and cases and can cause the karaoke to work improperly.
Use only fresh batteries of the required size and recommended type.
Batteries can leak chemicals that damage your karaoke’s electronic
parts.
Wipe the karaoke with a damp cloth occasionally to keep it looking new.
Do not use harsh chemicals, cleaning solvents, or strong detergents to
clean the karaoke.
Modifying or tampering with the karaoke’s internal components can cause a mal-
function and might invalidate its warranty and void your FCC authorization to oper-
ate it. If your karaoke is not performing as it should, take it to your local RadioShack
store for assistance.
9
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32-1168.fm Page 10 Thursday, January 20, 2000 11:32 AM
THE FCC WANTS YOU TO
KNOW
Your karaoke might cause TV or radio
interference even when it is operating
properly. To determine whether your
karaoke is causing the interference, turn
off the karaoke. If the interference goes
away, your karaoke is causing the inter-
ference. Try to eliminate the interference
by:
• Moving your karaoke away from the
receiver
• Using outlets on different electrical
circuits for the karaoke and the TV
or radio
• Contacting your local RadioShack
store for help
If you cannot eliminate the interference,
the FCC requires that you stop using
your karaoke.
10
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32-1168.fm Page 11 Thursday, January 20, 2000 11:32 AM
SPECIFICATIONS
Power Supply .................................................................... 6 Volts DC: 4 AA Batteries
6 Volts DC Optional AC Adapter (Delivers 50 mA Minimum)
AUX Input Impedance ................................................................... 22 kohm (Nominal)
MIC 1/MIC 2 Maximum Volume Hum ............................................. 0.8 mV (Nominal)
Total Harmonic Distortion .................................................................................... 1.2%
9
11
1
×
×
16
16
8
Dimensions (HWD) .............................................................. 2 /
6 /
5 / Inches
×
×
(65 170 130 mm)
Specifications are typical; individual units might vary. Specifications are subject to
change and improvement without notice.
11
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32-1168.fm Page 12 Thursday, January 20, 2000 11:32 AM
Limited Ninety-Day Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-
VISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limita-
tion of incidental or consequential damages, so the above limitations or exclusions may not apply to
you.
In the event of a product defect during the warranty period, take the product and the RadioShack
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the prop-
erty of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
We Service What We Sell
12/99
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
01A00
Printed in Hong Kong
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