Panasonic Speaker System AMX 25 User Manual

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Cat. No. 40-1372  
OWNER’S MANUAL  
Please read before using this equipment.  
AMX-25  
900 MHz Wireless Amplified Speakers  
 
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PREPARATION  
If you are using your audio  
source’s stereo headphones jack,  
connect the white and red plugs  
at the other end of the patch cord  
to the white and red phono jacks  
on the supplied Y-cable.  
INSTALLING THE  
TRANSMITTER  
Connecting to Your Audio  
Source  
You can connect the transmitter to  
your audio source’s left and right au-  
dio output jacks or its headphones  
jack.  
Do not connect the trans-  
Caution:  
mitter to the audio source’s speaker  
output. Doing so could damage the  
transmitter and audio source.  
If your audio source has a 1/8-inch  
headphones jack, connect the 1/8-  
inch stereo plug on the other end  
of the Y-cable directly to the  
audio source’s 1/8-inch head-  
phones jack.  
1. Connect one end of the supplied  
audio patch cord to the transmit-  
ter’s AUDIO IN jacks (white plug to  
L and red plug to R).  
If your audio source has a  
Note:  
1/4-inch headphones jack, use the  
supplied 1/8-to-1/4-inch stereo  
adapter.  
2. If you are using your audio  
source’s audio output jacks, con-  
nect the white and red plugs at  
the other end of the patch cord  
directly to the audio source’s cor-  
responding left and right audio  
jacks (white plug to left and red  
plug to right).  
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Connecting to Power  
INSTALLING THE  
SPEAKERS  
Plug the supplied AC adapter’s small  
straight barrel plug into the transmit-  
ter’s DC 18V jack. Then plug the  
adapter into a standard AC outlet.  
Select a location for each speaker  
that is near an AC outlet.  
Each speaker’s supplied  
Caution:  
AC adapter (in a box marked FOR  
SPEAKER) provides 15 volts and at  
least 800 milliamps, and its plug’s  
center tip is positive. Using an adapt-  
er that does not meet these specifica-  
tions could damage the adapter or  
the speaker.  
Cautions:  
Follow these steps to install the  
speakers.  
• The transmitter’s supplied AC  
adapter (in a box marked FOR  
TRANSMITTER) provides 18 volts  
and at least 150 milliamps, and  
its plug’s center tip is positive.  
Using an adapter that does not  
meet these specifications could  
damage the adapter or the trans-  
mitter.  
1. Turn off both speakers by rotating  
their POWER/VOL knobs fully  
counterclockwise until they click.  
• The CHARGER jack on the trans-  
mitter is for charging the  
RadioShack PRO-100 Wireless  
Headphones (Cat. No. 33-1145).  
Do not plug any other device into  
this jack.  
2. Set each speaker’s mode switch  
as follows:  
L — For the left stereo speaker  
R — For the right stereo speaker  
MONO — If your source is mono  
3. Plug the AC adapter’s large right-  
angle barrel plug into the  
speaker’s DC 15V 800mA jack.  
4. Plug the AC adapter into a stan-  
dard AC outlet.  
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OPERATION  
Follow these steps to use your speak-  
ers.  
5. Slowly rotate TUNING on each  
speaker until the indicator on the  
front of each speaker lights  
steadily.  
1. Turn on your audio source.  
2. Rotate the transmitter’s LEVEL all  
the way to the right (minimum  
setting).  
Notes:  
• When the indicator lights  
steadily, the speaker is tuned  
to the same frequency being  
transmitted by the transmitter.  
3. If you connected the transmitter  
to an audio source’s LINE OUT-  
PUT jack (or a jack that is not  
controlled by the audio source’s  
volume control), slowly rotate  
LEVEL to the left until the indica-  
tor at the front of the transmitter  
just starts to flicker.  
• If reception is poor, even when  
the speakers are near the  
transmitter, try either raising  
the transmitter to a position  
higher than the speakers or  
moving it away from the audio  
source.  
If you connected the transmitter  
to an audio source’s headphones  
jack (or jack that is controlled by  
the audio source’s volume con-  
trol), set the audio source’s vol-  
ume to the desired level first  
(about midway), then slowly  
rotate LEVEL to the left until the  
indicator at the front of the trans-  
mitter just starts to flicker.  
• When transmitting over long  
distances, the signal might get  
weaker and the indicator might  
dim. When this happens, your  
speakers continue to operate  
but receive the signals in mon-  
aural instead of stereo.  
6. Rotate each speaker’s POWER/  
VOL knob to a comfortable listen-  
ing level.  
Some audio sources might  
Note:  
not make the indicator flicker. For  
these sources, simply rotate  
LEVEL all the way to the left.  
Make sure you set both  
Note:  
speakers’ POWER/VOL knobs to  
the same level so the stereo  
sounds are properly balanced  
between the two speakers.  
4. Rotate each speaker’s POWER/  
VOL knob clockwise until it clicks  
and you hear the program source  
or hissing.  
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7. Set BASS on the back of each  
speaker to ON for a deeper, richer  
bass sound.  
IF YOU HAVE  
A PROBLEM  
If you cannot get sound once you  
have connected the system, check  
these things:  
• Make sure you rotate each  
speaker’s  
POWER/VOL  
knob  
clockwise until it clicks so the  
speakers are turned on  
• Be sure the AC adapters are  
plugged in and have power  
Be sure to turn off the speakers when  
you are not using them.  
• Be sure the audio source is  
turned on and tuned to an active  
frequency  
If you hear distorted sound, check  
these things:  
• If you have connected to jacks  
that are controlled by the audio  
source’s volume control, be sure  
the source’s volume control is  
turned up  
• Adjust TUNING on the speakers  
• Change the position of the trans-  
mitter  
• Rotate FREQ. ADJUST on the  
transmitter and then adjust TUN-  
ING until the interference goes  
away  
• Adjust the speaker’s volume con-  
trol  
• Adjust TUNING on the speakers  
• Adjust LEVEL on the transmitter  
so the indicator at the front of the  
transmitter occasionally flickers  
• Change the position of the trans-  
mitter  
If you still have a problem with the  
speaker system, see your local Ra-  
dioShack store for assistance.  
ADJUSTING THE  
FREQUENCY  
If you receive interference from other  
devices, you might be able to reduce  
it by adjusting the speaker’s operating  
frequency. Simply rotate FREQ. AD-  
JUST on the transmitter, then rotate  
TUNING on each speaker until the au-  
dio is free from interference.  
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CARE AND MAINTENANCE  
Your Optimus 900 MHz Wireless Amplified Speakers are an example of superi-  
or design and craftsmanship. The following suggestions will help you care for  
your speakers so you can enjoy them for years.  
Keep the speakers dry. If they get wet, wipe them dry immediately.  
Liquids might contain minerals that can corrode the electronic cir-  
cuits.  
Use and store the speakers only in normal temperature environ-  
ments. Temperature extremes can shorten the life of electronic de-  
vices and distort or melt plastic parts.  
Handle the speakers gently and carefully. Dropping them can dam-  
age the circuit boards and can cause the speakers to work improp-  
erly.  
Keep the speakers away from dust and dirt, which can cause pre-  
mature wear of parts.  
Wipe the speakers with a damp cloth occasionally to keep them  
CLEANER  
looking new. Do not use harsh chemicals, cleaning solvents, or  
strong detergents 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 autho-  
rization to operate it. If your speaker system is not operating as it should, take it  
to your local RadioShack store for assistance.  
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SPECIFICATIONS  
TRANSMITTER  
Operating Frequency Range ...................................................912.5–914.5 MHz  
Power Source .................................................................18V DC, 150 milliamps  
SPEAKERS  
Frequency Response.....................................................................50 Hz–15 kHz  
S/N Ratio ................................................................................................... 55 dB  
Stereo Separation ................................................................................. 20 dB  
Audio Distortion .......................................................................................... 2%  
Operating Range ..............................................................150 Feet (Open Field)  
Automatic Frequency Control (AFC) ................................. More than ±150 kHz  
Tuning Range ....................................................................... 913.5 ±1.25 MHz  
Minimum Volume Hum ............................................................................ < 2mV  
Bass Boost Effect (100 Hz) .................................................................... 8 ±2 dB  
Power ...........................................................................................10 Watts RMS  
Power Source .................................................................15V DC, 800 milliamps  
Speaker Elements .............................................. 2-Inch Tweeter, 4-Inch Woofer  
Specifications are typical; individual units might vary. Specifications are subject  
to change and improvement without notice.  
SUPPLIED ACCESSORIES  
Audio Patch Cord  
Y-Cable  
1/8-to-1/4-inch Stereo Adapter  
AC adapters  
RadioShack Limited Warranty  
This product is warranted against defects for 90 days 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 mis-  
use 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 WARRAN-  
TIES CONTAINED HEREIN. Some states do not permit limitation or exclusion of implied warranties; there-  
fore, 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.  
10/95  
We Service What We Sell  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
1A7  
Printed in China  
 

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