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Manual Krell Industries MDA-300/500

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  • Krell Industries MDA-300/500 - page 1

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  • Krell Industries MDA-300/500 - page 2

    A. INTRODUCTION Thank you for your purchase of the KRELL MDA-300 or MDA-500 power amplifiers. These amplifiers represent the latest evolution in amplifier technology and incorpo- rate many innovative design features. To obtain the best performance from your MDA-300/ 500s, careful attention should be paid to placement, installation and operation. A ...

  • Krell Industries MDA-300/500 - page 3

    TABLE OF CONTENTS 4. UNPACKING AND ASSEMBLY BASIC INSTALLATION AND OPERATION INPUT AND OUTPUT CONNECTIONS 8. AMPLIFIER OPERATION 9. PROTECTION CIRCUITRY 10. REAR PANEL DES CRIPTIONS 12. QUESTIONS AND ANSWERS 14. SPECIFICATIONS 15. WARRANTY AND SERVICE INFORMATION 3 ...

  • Krell Industries MDA-300/500 - page 4

    B. UNPACKING AND ASSEMBLY NOTE: Do to the extreme weight of the MDA-300 or MDA-500 it is strongly advised that unpacking and placement is completed by at least two individuals. 1. Open the box on one end. 2. Fold back the flaps on all four sides of the box and carefully roll it over on to the exposed end. 3. Pull the box straight up and off exposin ...

  • Krell Industries MDA-300/500 - page 5

    C. BASIC INSTALLATION AND OPERATION 1. Place the MDA-300/500, on a firm level surface away from excessive dirt or moisture. Ideally the amplifiers ’ should be placed as close, to the speakers as possible. ,It is always preferable torun long interconnect cables to tt~e amplifiers and keep speaker cable length t.o a minimu~m.. Speaker cable does ad ...

  • Krell Industries MDA-300/500 - page 6

    D. INPUT AND OUTPUT CONNECTIONS CAUTION: When making connections to this component or any other, make sure ttie power amplifiers are OFF and the preamplifier is in the MUTE or STANDBY mode. 1. Connect the speaker cables to the output terminals of each amplifier. The MDA-300/500s utilize two sets of parallel 5 way binding posts for the left and figh ...

  • Krell Industries MDA-300/500 - page 7

    Thepin assignment for the XLR is: pin _1-= shiel-d (ground) p!n 2 = non-inverting input (hot) pin 3 = inverting input NOTE: The RCA center conductor for each channel is wired_in, parallel with pin 2, the non-inv, erted input. Only one ot these inputs Should be connectecl to a preamplifier. 3. Insert the AC pow6r cord into the receptacle located on ...

  • Krell Industries MDA-300/500 - page 8

    E. AMPLIFIER OPERATION 1. Push the black button on the front of both amplifiers to turn them on. The blue LED on the front panels above each switch will illuminate. When turning on the system, the amplifiers should al- ways be last.-The MDA-300/50.0s On/Off switch is part of a multi-level turn-on circuit that goes through several steps of protectio ...

  • Krell Industries MDA-300/500 - page 9

    E PROTECTION CIRCUITRY There are no fuses in the MDA-300/500s. The amplifiers are protected by a series of non-intrusive, opto-coupled circuits that constantly evaluate the amplifier’s operation. Appropriate protecti’ce action exists for DC conditions, stiort circuit, oscillatidn, AC power anomalies, high ground resistance and out-of:phase grou ...

  • Krell Industries MDA-300/500 - page 10

    H. REAR PANEL DESCRIPTIONS All descriptions are for each amplifier chassis INPUTS: Balanced via 3 pin XER connector Single ended via RCA connector XLR PIN CONFIGURATION p!n 1 Shield (ground) p.ln 2 Non-inverting or 0 degrees (hot) pan 3 Inverting or 1-80 degrees OUTPUT: Two pairs of five-way binding posts in parallel OTHER: Standard AC receptacle 2 ...

  • Krell Industries MDA-300/500 - page 11

    I. QUESTIONS AND ANSWERS Q. Should I leave the MDA-300/500 on at all times? A. Although you could leave the MDA-300/500 on at all times without fear of damage to the amplifier, we recom- mend. 30 minutes of warm-up before critical listening and switching the amplifier off when not in use. ~ When Ipush the power button on the front of the DA-300/-50 ...

  • Krell Industries MDA-300/500 - page 12

    Q. After the amplifier is on for about one hour it be- comes very hot. Is this normal? A. Yes. Due to the high bias design of the MDA-300/500 it will become quite warm. After approximately 1 hour the amplifier will be at its optimum operating tempera- ture. If the amplifier should-have a severe temperature inbalance between the. left and right chan ...

  • Krell Industries MDA-300/500 - page 13

    J, SPECIFICATIONS MDA-300 GAIN 26dB SIGNAL-TO-NOISE 106dB unweighted THD 1K at 8 ohms less than .2% 20K at 8 ohms less than .4% INPUT IMPEDANCE 47,000 ohms (47K) INPUT SENSITIVITY 2.5 volts for 300 watts out OUTPUT IMPEDANCE .2 ohms OUTPUT VOLTAGE 139 volts peak to peak OUTPUT POWER All read!ngs are continuous output power, per channeI 8 ohms 300 w ...

  • Krell Industries MDA-300/500 - page 14

    K. WARRANTY AND SERVICE INFORMATION There are no user-serviceable parts inside the MDA-300/ 500. The MDA-300/500 has a limited warranty of f~ve years parts and labor. Return freight is included in ~the warranty. The warranty period b.egins on thee date ot p_u_rchase and is activated with the return ot the enclosed Warran.ty Card and a copy of the S ...

  • Krell Industries MDA-300/500 - page 15

    KRELL INDUSTRIES 35 HIGGINS DRIVE MILFORD CT 06460 SALES 203-874-3139 FAX 203-878-8373 COPYRIGHT 1992 KRELL INDUSTRIES (MDA9204) ...

Manufacturer Krell Industries Category Stereo Amplifier

Documents that we receive from a manufacturer of a Krell Industries MDA-300/500 can be divided into several groups. They are, among others:
- Krell Industries technical drawings
- MDA-300/500 manuals
- Krell Industries product data sheets
- information booklets
- or energy labels Krell Industries MDA-300/500
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 Krell Industries MDA-300/500.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Krell Industries MDA-300/500, service manual, brief instructions and user manuals Krell Industries MDA-300/500. 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 Krell Industries MDA-300/500.

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A complete manual for the device Krell Industries MDA-300/500, 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 Krell Industries MDA-300/500 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Krell Industries MDA-300/500.

A complete Krell Industries 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 Krell Industries MDA-300/500 - 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 Krell Industries MDA-300/500, 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 Krell Industries MDA-300/500, that we can find in the current document
3. Tips how to use the basic functions of the device Krell Industries MDA-300/500 - which should help us in our first steps of using Krell Industries MDA-300/500
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Krell Industries MDA-300/500
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Krell Industries MDA-300/500 in a specific country, if it was not possible to solve the problem on our own.

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