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Manual Radio Shack MPA-50

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  • Radio Shack MPA-50 - page 1

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

  • Radio Shack MPA-50 - page 2

    2 ˆ Contents Features ......... ................ ................ ................ ................. ................ ................ ......... 3 Preparation ....... ................ ................ ............. ................. ................ ................ ......... 4 Presetting th e Controls ................ ................. .......... ...

  • Radio Shack MPA-50 - page 3

    3 Features ˆ Features Your RadioShack MPA-50 40- Watt PA Amplifier gives you 40 watts of solid power for your public address (PA) sys- tem. The built-in three-ba nd equalizer enables you to tailor the sound to fit your environment. Its wide frequ ency re- sponse easily handles amplification of voice and music. Its other featu res include: Built-In ...

  • Radio Shack MPA-50 - page 4

    4 Preparation ˆ Preparation PRESETTING THE CONTROLS Warning: A sudde n high out put from the amplifier could dama ge your hearing or the speakers conn ected to the amplif i- er’s output. To avoid accidentally overdr iving a channel or premat urely amplifying an audio input, se t all the amplifier’s front- panel controls to their lowest set tin ...

  • Radio Shack MPA-50 - page 5

    5 Making Connections ˆ Making Connections Important: Connect all auxiliary equipment and speakers before connecting pow er. PHONO L (Left) a nd R (Right) Input Jacks — Connect a turntable with a magnetic cart ridge. To avoid di stortion, do not connect a high-le vel audio input source to these jacks. Even th ough the amplifier has L and R input ...

  • Radio Shack MPA-50 - page 6

    6 Speakers ˆ Speakers SPEAKER PHASING Phasing is the direction the sp eaker cone moves with re feren ce to the polari- ty of the con nection wires. Prope r phas- ing is import ant when you use mo re than one speaker in the same room or area. Out-of-phase spea kers can lose up to one-half of the ir potential volume , and can have a significantly de ...

  • Radio Shack MPA-50 - page 7

    7 Speakers determine if your speakers ar e connect- ed in series, pa rallel, or series /parallel combined. Note: We recommend that you use speakers th at are rated the same (f or example, all 8- ohm speakers ) for all se- ries or parallel connections. • Speakers are co nnected in series when the first speaker’s positive ter- minal is connected ...

  • Radio Shack MPA-50 - page 8

    8 Speakers One Speaker Connect the speaker ’s negative (– ) ter- minal to the amplifier’s COM (common) terminal. Th en connect the sp eaker’s positive (+) terminal to the amplifier’s terminal that matche s the speaker’s im- pedance. For example, if you have an 8 - ohm speaker, connect the speake r’s positive terminal to the amp lifier ...

  • Radio Shack MPA-50 - page 9

    9 Speakers Speakers in Parall el 1. T o determine the total impedance of speakers connected in parallel, divide the impe dance of one speaker by the numbe r of speakers . For example, if you want to connect two 8-ohm speaker s in parallel, divide 8 (the impedance of one speaker) by 2 (the number of spea k- ers) for a total speaker imp edance of 4 o ...

  • Radio Shack MPA-50 - page 10

    10 Speakers 4. T o determine the total impedance of speakers connected in serial and parallel combined, divide the imped- ance of one pair of speakers by the number of pairs. For example, if you want to co nnect four 8-ohm spea kers in serial and parallel combin ed, divide 16 (the impedance of one p air of speakers) by 2 (the number of sp eaker pai ...

  • Radio Shack MPA-50 - page 11

    11 Speakers Cautions: • Before you connect th e speakers, be sure the total wat tage of the primary taps you intend to use do es not exceed the am plifier’s maximum 40-watt output power rating. • Avoid multiple connections to the amplifier ’s 70V an d COM terminals. Follow these ste ps to make the connections. 1. Connect a wire from th e am ...

  • Radio Shack MPA-50 - page 12

    12 Controls and Operation ˆ Controls and Operation MICROPHONE 1 and 2 Inputs — Con- nect any standard d ynamic microphone with a 1 / 4 -inch plug. POWER Switch and Indicator — Press the bottom h alf of the switch to turn on the amplifier. The indicator lights. Press the top half of th e switch to turn o ff the amplifier. The indi cator goes of ...

  • Radio Shack MPA-50 - page 13

    13 Troubleshooting ˆ T roubleshooting If you should ru n into difficulties, che ck the wiring of the system. Are the re any short circuits in th e speaker wirin g? Have you provided adequate ventila - tion? Did you calculate sp eaker imped- ance corr ectly? Be sure microphon es and connecting cables are not defective. Be sure you ar e using large ...

  • Radio Shack MPA-50 - page 14

    14 Care ˆ Care To enjoy your MPA-50 40-Watt PA Am- plifier for a long time: • Keep the amplif ier dry . If it get s wet, wipe it dry immediately . • Use and store the amplifier only in normal temperature environments. • Han dle the amplifier gently and carefully . Don’t drop it. • Keep the amplifier away from dust and dirt. • Wipe the ...

  • Radio Shack MPA-50 - page 15

    15 Specifications ˆ Specifications Output Power at 1 kHz, 10% THD ................. .............. ................ .............. .............. .... 40 W atts Power Bandwidth at 1W , 10% THD, Auxiliary Input ............................................ 70 Hz–20 kHz THD at 2W , 1 kHz MIC1 .......... ........... .............. .............. ... ...

  • Radio Shack MPA-50 - page 16

    32-2002 81 108 1780C 02A00 Printed in China RadioShack A Division of Ta ndy Corporation Fort Worth, Texas 76102 Limited One-Y ear Warranty This product is warranted by RadioShack against manufactu ring defects in material and workman- ship under normal use for one (1 ) year from t he da te of pu rchase from Radi oSha ck compan y- owned stores and a ...

Manufacturer Radio Shack Category Stereo Amplifier

Documents that we receive from a manufacturer of a Radio Shack MPA-50 can be divided into several groups. They are, among others:
- Radio Shack technical drawings
- MPA-50 manuals
- Radio Shack product data sheets
- information booklets
- or energy labels Radio Shack MPA-50
All of them are important, but the most important information from the point of view of use of the device are in the user manual Radio Shack MPA-50.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Radio Shack MPA-50, service manual, brief instructions and user manuals Radio Shack MPA-50. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Radio Shack MPA-50.

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A complete manual for the device Radio Shack MPA-50, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Radio Shack MPA-50 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Radio Shack MPA-50.

A complete Radio Shack manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Radio Shack MPA-50 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Radio Shack MPA-50, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Radio Shack MPA-50, that we can find in the current document
3. Tips how to use the basic functions of the device Radio Shack MPA-50 - which should help us in our first steps of using Radio Shack MPA-50
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Radio Shack MPA-50
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Radio Shack MPA-50 in a specific country, if it was not possible to solve the problem on our own.

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