Samsung Speaker MPS 50 User Guide

32-2046.fm Page 1 Monday, January 24, 2000 12:33 PM  
Cat. No. 32-2046  
OWNER’S MANUAL  
Please read before using this equipment.  
50 Watt Speaker/Amplifier  
MPS-50  
 
32-2046.fm Page 3 Monday, January 24, 2000 12:33 PM  
Cautions:  
To reduce the risk of fire or  
shock hazard, do not expose this product to rain  
or moisture.  
WARNING:  
To prevent electrical shock, any AC-  
powered equipment that you con-  
nect to the MPS-50 should be con-  
nected to a 3-prong (grounded) AC  
outlet.  
CAUTION  
RISK OF ELECTRIC SHOCK.  
!
DO NOT OPEN.  
To avoid damaging the MPS-50's  
speaker, connect the sound source  
to the MPS-50 first, then connect  
the MPS-50 to power.  
TO REDUCE THE RISK OF  
CAUTION:  
ELECTRIC SHOCK, DO NOT REMOVE  
COVER OR BACK. NO USER-SERVICE-  
ABLE PARTS INSIDE. REFER SERVICING  
TO QUALIFIED PERSONNEL.  
• Be sure to rotate MASTER to MIN  
(minimum) before you connect the  
MPS-50 to power, or before you  
connect or disconnect an input  
source to the MPS-50.  
This symbol is intended to alert  
you to the presence of uninsu-  
lated dangerous voltage within  
the product’s enclosure that might  
be of sufficient magnitude to con-  
stitute a risk of electric shock. Do  
not open the product’s case.  
MASTER  
MI  
MA  
INPUT  
GAIN  
BASS  
TREBLE  
REVERB  
INPUT  
GAIN  
BASS  
TREBLE  
REVERB  
REVERB  
LEVEL  
DISTORTION  
MASTER  
This symbol is intended to inform  
you that important operating and  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
OFF  
MA  
MI  
MA  
ON OFF  
ON OFF  
HIGH  
LOW  
HIGH  
LOW  
CHANNEL  
1
CHANNEL  
2
POWER  
maintenance instructions are  
included in the literature accom-  
panying this product.  
!
3
 
32-2046.fm Page 4 Monday, January 24, 2000 12:33 PM  
CONNECTIONS  
To receive signal from the connected  
INPUT  
1
4
device, connect a phone cable with a / -  
inch (6.35 mm) plug to the MPS-50’s  
RETURN jack, then connect the other  
end to the device’s output jack.  
Note: You can connect audio equipment  
with a stereo or monaural plug. When  
you connect a stereo plug, the MPS-50  
converts the stereo output to monaural.  
Use a phone cable (available at your lo-  
REVERB REMOTE  
1
4
cal RadioShack store) with a / -inch  
(6.35 mm) plug to connect an electric  
guitar, keyboard, or high impedance mi-  
crophone to the HIGH input jack of  
Channel 1 and/or Channel 2.  
You can connect an optional remote  
footswitch to the MPS-50’s REVERB RE-  
MOTE jack and use the switch to control  
reverb effects.  
PHONES  
LINE  
OUT  
RETURN  
SEND  
REVERB  
REMOTE  
1
4
Use a phone cable with a / -inch (6.35  
mm) plug to connect a low impedance  
(200–600 ohms) microphone to the LOW  
jack of Channel 1 and/or Channel 2.  
CAUTION DISCONNECT SUPPLY CORD BEFORE CHANGING  
CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE  
ONLY  
T  
.
NO. 32-2046  
MPS-50  
~120V AC 60Hz  
150W  
GUITAR AMPLIFIER  
POWER SUPPLY: ~120V 60Hz 1(FUSE 2A  
250V)  
Custom Manufactured in China  
andy  
Corporation, Fort Worth, TX 76102  
COMMERCIAL AUDIO  
EQUIPMENT  
POWER  
for RadioShack  
,
A
Division of  
T
115703  
PHONES  
LINE  
OUT  
RETURN  
SEND  
REVERB  
REMOTE  
FUSE 2A  
250V  
CAUTION  
RISK OF ELECTRIC  
DO NOT OPEN  
CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD  
RECEPTACLE  
OUTPUT  
POWER  
To play the MPS-50's output signal  
through your sound system, connect  
one end of an audio patch cord (avail-  
Note: Before you connect the MPS-50  
to AC power, set POWER to the off (out)  
position and MASTER to MIN.  
able at your local RadioShack store)  
1
4
with a / -inch (6.35 mm) phone plug to  
the MPS-50's LINE OUT jack. Then con-  
nect the other end to your amplifier/re-  
ceiver/mixer's input jack.  
Connect the female jack end of the sup-  
plied power cord to the AC jack on the  
back of the MPS-50, then connect the  
other end to a standard AC outlet.  
SEND AND RETURN  
To send the MPS-50's signal to a sound  
effect device, such as an echo reverb or  
digital sampler processor, connect a  
CAUTION DISCONNECT SUPPLY CORD BEFORE CHANGING  
CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE  
ONLY  
CAT  
.
NO. 32-2046  
MPS-50  
~120V AC 60Hz  
150W  
GUITAR AMPLIFIER  
POWER SUPPLY: ~120V 60Hz 150W (FUSE 2A  
250V)  
Custom Manufactured in China  
andy  
Corporation, Fort Worth, TX 76102  
COMMERCIAL AUDIO  
EQUIPMENT  
POWER  
for RadioShack  
,
A
Division of  
T
115703  
SEND  
PHONES  
LINE  
OUT  
RETURN  
REVERB  
REMOTE  
FUSE
25
CAUTION  
RISK OF ELECTRIC  
DO NOT OPEN  
CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD  
RECEPTACLE  
phone cable (available at your local Ra-  
1
4
dioShack store) with a / -inch (6.35 mm)  
plug to the MPS-50’s SEND (output)  
jack, then connect the other end to the  
sound effect device’s input jack.  
4
 
32-2046.fm Page 5 Monday, January 24, 2000 12:33 PM  
OPERATION  
USING HEADPHONES  
INPUT  
GAIN  
BASS  
INPUT  
GAIN  
BASS  
To listen privately, connect low-imped-  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
HIGH  
LOW  
HIGH  
LOW  
CHANNEL  
1
CHANNEL 2  
ance headphones (available at your lo-  
1
4
cal RadioShack store) with a / -inch  
(6.35 mm) phone plug to the PHONES  
INPUT  
GAIN  
BASS  
TREBLE  
REVERB  
INPUT  
GAIN  
BASS  
TREBLE  
REVERB  
REVERB  
LEVEL  
DISTORTION  
MAS  
jack on the back of the MPS-50.  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
MI  
MA  
OFF  
MA  
MI  
ON OFF  
ON OFF  
HIGH  
LOW  
HIGH  
LOW  
CHANNEL  
1
CHANNEL  
2
PHONES  
1. Rotate MASTER to MIN.  
2. Press POWER up to turn on the  
MPS-50. The POWER indicator  
lights.  
CAUTION DISCONNECT SUPPL  
CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE  
ONL  
Y
CORD BEFORE CHANGING  
Y
CAT  
.
NO. 32-2046  
MPS-50  
~120V AC 60Hz  
150W  
GUITAR AMPLIFIER  
POWER SUPPLY: ~120V 60Hz 150W (FUSE 2A  
250V)  
Custom Manufactured in China  
andy  
Corporation, Fort Worth, TX 76102  
COMMERCIAL AUDIO  
EQUIPMENT  
POWER  
R
for RadioShack  
,
A
Division of  
T
115703  
SEND  
PHONES  
LINE  
OUT  
RETURN  
REVERB  
REMOTE  
FUSE 2A  
250V  
CAUTION  
RISK OF ELECTRIC  
DO NOT OPEN  
CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD  
RECEPTACLE  
3. Adjust the sound for each channel  
where you have connected an input  
source.  
Listening Safely  
• Rotate GAIN clockwise toward  
MAX to increase the volume, or  
counterclockwise toward MIN to  
reduce it.  
To protect your hearing, follow these  
guidelines when you use headphones.  
• Set the volume to the lowest setting  
before you begin listening. After you  
begin listening, adjust the volume to  
a comfortable level.  
• Rotate BASS clockwise toward  
MAX to increase the low fre-  
quency sounds, or counterclock-  
wise toward MIN to reduce them.  
• Do not listen at extremely high vol-  
ume levels. Extended high-volume  
listening can lead to permanent  
hearing loss.  
• Rotate TREBLE clockwise toward  
MAX to increase the high fre-  
quency sounds, or counterclock-  
wise toward MIN to reduce them.  
• Once you set the volume, do not  
increase it. Over time, your ears  
adapt to the volume level, so a vol-  
ume level that does not cause dis-  
comfort might still damage your  
hearing.  
• Rotate DISTORTION until you hear  
the amount of distortion you want.  
• Press REVERB in on each chan-  
nel where you want to apply  
reverb effects. Then rotate  
REVERB LEVEL toward MAX to  
increase the amount of reverb, or  
toward MIN to lower it.  
4. To turn the MPS-50 off, press  
POWER down.  
5
 
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CARE  
To enjoy your MPS-50 for a long time:  
Important Notes:  
• Keep the MPS-50 dry. If it gets wet,  
wipe it dry immediately.  
• Let the MPS-50 cool down and see  
if it starts again before you assume  
a fuse needs to be replaced.  
• Use and store the MPS-50 only in  
normal temperature environments.  
• Because the internal supply fuse is  
located on the printed circuit board,  
we strongly recommend that you  
take it to your local RadioShack  
store rather than attempting to  
replace it yourself.  
• Handle the MPS-50 gently and care-  
fully. Don’t drop it.  
• Keep the MPS-50 away from dust  
and dirt.  
• Wipe the MPS-50 with a damp cloth  
occasionally to keep it looking new.  
Caution: Do not use a fuse with ratings  
other than those specified here. Doing  
so might damage your MPS-50.  
Modifying or tampering with the MPS-  
50’s internal components can cause a  
malfunction and invalidate its warranty.  
If your MPS-50 is not performing as it  
should, take it to your local RadioShack  
store for assistance.  
REPLACING THE FUSES  
If the MPS-50 does not operate, the  
power fuse under the AC socket on the  
rear panel or the internal suppy fuses on  
the printed circuit board might have  
blown. If this happens, replace the fuses  
with new ones of the same type, avail-  
able at your local RadioShack store.  
Power fuse  
2 Amp 250V, slow blow  
Internal supply fuse  
3.5 Amp 250V, slow  
blow  
6
 
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SPECIFICATIONS  
Input Impedance .................................................................... 15K Ohms (High Level)  
3K ohms (Low Level)  
Output Power, 1% T.H.D., 4 Ohms Load, 1 kHz ........................................... 50 Watts  
10% T.H.D. 4 Ohm Load, 1 kHz .................................................................... 65 Watts  
Line Out (High 50 mV Input), 2 kHz ................................................................ 500 mV  
Send Out (High 50 mV Input), 2 kHz .............................................................. 500 mV  
T.H.D. at 2 kHz 2w ............................................................. 0.2% High and Low Level  
Input Sensitivity, 2 kHz at 50 Watts Output .................................. 50 mV (High Level)  
5 mV (Low Level)  
S/N Ratio (A-Weighted) ................................................................ 70 dB (High Level)  
60 dB (Low Level)  
Frequency Response 0 dB = 2W (2 kHz) .................... 100 Hz –10 dB, 10 kHz +5 dB  
High and Low Level  
Tone Control, Bass, 100 Hz ............................................. +8 dB (Max.) –11 dB (Min.)  
Tone Control, Treble, 10k Hz ........................................... +8 dB (Max.) –11 dB (Min.)  
Return In 2 kHz 50 Watts Output .................................................................... 500 mV  
Delay Time ...................................................................................................... 150 mS  
Noise Level ......................................................................................................... 2 mV  
Power Requirement .......................................................................... AC 120 V/60 Hz  
Speaker ............................................................................................ 12-Inch, 4 Ohms  
1
1
2
3
Dimensions (HWD) ................................................................ 18 / × 16 / × 11 Inches  
(470 × 415 × 280 mm)  
Weight ................................................................................................................ 34 lbs  
(15.04 kg)  
Specifications are typical; individual units might vary. Specifications are subject to  
change and improvement without notice.  
7
 
32-2046.fm Page 8 Monday, January 24, 2000 12:33 PM  
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 the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental 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  
04/99  
We Service What We Sell  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
08A99  
Printed in China  
 

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