Optimus Karaoke Machine 32 1168 User Manual

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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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  
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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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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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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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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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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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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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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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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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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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