Radio Shack MPA-50 Owner'S Manual Download Page 16

32-2002

811081780C

02A00

Printed in China

RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102

Limited One-Year Warranty

This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for one (1) year from the date of purchase from RadioShack company-owned
stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-
dioShack 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 LIABILITY OR RE-
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED 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

32-2002.fm  Page 16  Friday, February 11, 2000  11:36 AM

Summary of Contents for MPA-50

Page 1: ...Owner s Manual Please read before using this equipment MPA 50 40 Watt PA Amplifier 32 2002 fm Page 1 Friday February 11 2000 11 36 AM...

Page 2: ...edance 6 Connecting Speakers 7 One Speaker 8 Two or More Speakers Without Transformers 8 Multiple Speakers with Transformers 10 Controls and Operation 12 Troubleshooting 13 Care 14 Replacing the Fuse...

Page 3: ...Auxiliary Volume Control lets you adjust the volume of the connected equipment Priority Terminals let you connect an optional switch to cut out all other au dio input sources and give priority to onl...

Page 4: ...with adequate venti lation Do not place the amplifier on thick carpeting or cushions which can restrict the air flow or near a heat source such as a heat vent or radiator which can cause the amplifie...

Page 5: ...r turntable to this screw to avoid a low frequency hum You can also use this screw to ground any other system connection PHONO AUX CD Switch Select the input source Even if you connected auxiliary equ...

Page 6: ...2 Connect one end of the wire to one of the speaker terminals 3 Touch the positive end of a 1 5 volt flashlight battery to the speaker ter minal that does not have the wire attached to it 4 Touch the...

Page 7: ...ohms If you connect more than two speak ers using only series or only parallel connections the total impedance might exceed the amplifier s maxi mum impedance 16 ohms or fall below its minimum impedan...

Page 8: ...d system you must determine the total impedance of the speakers before you can make the correct connection The total impedance of all the speakers must match one of the amplifier s output terminals 4...

Page 9: ...this example Series and Parallel Combined If you must hook up more than two speakers you might have to use a com bination of series and parallel connec tions to get a total impedance that matches one...

Page 10: ...require many speakers and long runs of connecting wire we recom mend you use a line transformer not supplied Note When running lengths of wire longer than 50 feet use wire that is heavier than 16 gaug...

Page 11: ...n necting a 2 5 watt speaker to a transformer connect this wire to the 2 5 tap on that transformer s primary side 2 Connect a wire from the amplifier s COM terminal to the COM tap on each trans former...

Page 12: ...PHONO AUX Source Mixing Control Adjusts the input level of the PHONO or AUX CD sound source for the best volume and balance 150Hz Equalizer Control controls output for instruments in this very low ra...

Page 13: ...ker wire You should always use 16 gauge or larger wire The longer the run of speaker wire the heavier the gauge should be If you have feedback problems reposi tion your microphones and speakers or adj...

Page 14: ...RadioShack store for assistance REPLACING THE FUSE The power fuse protects your amplifier from power voltage or current surges when operating it from an AC power source If the POWER indicator does no...

Page 15: ...z AUX CD 70 Hz 20 kHz PHONO 100 Hz 12 dB 10 kHz 13 dB Equalizer Control Range at Each Band Peak Point 150Hz 12 dB 1kHz 12 dB 6kHz 12 dB Crosstalk from AUX to PHONO 40 dB Nominal Hum and Noise at 8 Ohm...

Page 16: ...efect 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 c...

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