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Manual Parasound A 51

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Summary
  • Parasound A 51 - page 1

    A 5 1 Amplif ier Owner’ s Guide ...

  • Parasound A 51 - page 2

    Congratulations and Thank Y ou for Choosing Parasound Y our new P arasound Halo Series A 51 pow er amplifier presents the latest advancements in amplifier tec hnology . The A 51 is built to the strict qualit y and performance standards set by P arasound. W e’ re proud to of f er you this e xceptional audio component that will bring y ou many y ea ...

  • Parasound A 51 - page 3

    T ABLE OF CONTENTS A 51 Amplifier PLACEMENT GUIDELINES FOR YOUR A 51 2 CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 51 3 CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 51 4 CONNECTING YOUR SPEAKERS TO THE A 51 5 MANUAL AND AUTOMA TIC TURN ON-OFF OPTIONS 6 CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMA TIC ON-O ...

  • Parasound A 51 - page 4

    PLACEMENT GUIDELINES FOR YOUR A 51 Power amplifiers are usually heavier and generate more heat than other components. T o avoid damage to the A 51 or other equipment and to reduce risk of fire, you must follow these guidelines: • A cable with a 2.5 mm sub-mini plug on eac h end (provided). • Place the A 51 on a separate shelf that will adequate ...

  • Parasound A 51 - page 5

    CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 51 Left and Right Balanced Input Jacks Balanced connections will giv e you the best sound. If y our surround controller has balanced XLR output jac ks, we recommend that you connect them to these inputs. R ef er to the Balanced and Unbalanced Lines in the T ec hnically Speaking secti ...

  • Parasound A 51 - page 6

    CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 51 Ch 1-5 Unbalanced Inputs Use these inputs if your sur round controller doesn ’ t ha ve balanced output connectors or if y ou simply pref er to use unbalanced connections. What Y ou ’ ll Need: • Five shielded interconnect cables with R CA plugs • A surround controller wit ...

  • Parasound A 51 - page 7

    CONNECTING YOUR SPEAKERS TO THE A 51 Speaker T erminals The A 51 speaker terminals accept speak er wires with banana plugs or bare ends. Ref er to Bare W ire Speaker T ermination in the T echnically Speaking section f or information about bare wire termination. What Y ou ’ ll Need: • Five lengths of A WG 1 6 or thic ker speaker wire with banana ...

  • Parasound A 51 - page 8

    MANUAL AND AUTOMA TIC TURN ON-OFF OPTIONS Y ou can manually turn the A 51 on and off with its front panel On-Off button. It can also be triggered to turn on and off automatically when your preamplifier , surround controller , or system controller is turned on and off. Manual On-Off from the Front Panel If you w ant to manually turn on and of f the ...

  • Parasound A 51 - page 9

    CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMA TIC TURN ON-OFF T o automatically turn on and off the A 51 with an external DC voltage, choose the DC T riggering option by moving the Auto T urn On switch on the rear panel to its lower 1 2 V position. What Y ou ’ ll Need: • A cable with a 2.5 mm sub-mini plug on eac h end (provided) • A “ contro ...

  • Parasound A 51 - page 10

    UNDERST ANDING THE INDICA TORS ON THE A 51 a AC Present Indication When the A 51 is plugged into a liv e A C outlet, a sof t blue halo glows behind its On-Of f but ton and its red “ P ” Badge glo ws faintly . These indicate that the unit is plugged into a liv e A C outlet, even when it is t urned off . b On, Off and Fault/Protection Status Indi ...

  • Parasound A 51 - page 11

    CONNECTING THE A 51 AC POWER CORD AC Power Connections W e recommend that you plug y our A 51 into the same A C wall outlet or pow er strip that pow- ers your other audio components, especially the preamplifier or sy stem controller . Having all the audio components on the same pow er circuit helps prev ent hum caused by possible ground loops. The ...

  • Parasound A 51 - page 12

    MAINT AINING YOUR A 51 Y our Parasound A 51 power amplifier requires no periodic maintenance and has no user - serviceable parts inside. T o avoid the risk of electric shock, do not remove its top cover . The amplifier ’ s exterior can easily be cleaned with a soft cloth pre-moistened only with a few drops of water or glass cleaner . Main Power F ...

  • Parasound A 51 - page 13

    TROUBLESHOOTING GUIDE 11 No pow er Auto turn on doesn’ t function with a trigger voltage Auto turn on doesn’ t function with an audio input signal A 51 will not turn of f when audio signal is remov ed P ow er on, but no sound On-Of f but ton glows red and c hannel indicator(s) of f Distorted sound Hum and / or buzz through speak ers A 51 is ov ...

  • Parasound A 51 - page 14

    SERVICING YOUR A 51 If All Else Fails – Call Us for Help Call your P arasound dealer or Parasound ’ s T ec hnical Ser vice Department toll free at 1 -866-770-TECH (8324). W e can of ten solve the problem with simple diagnostic tests y ou can per- form y ourself . If we determine that your A 51 will need further inspection or ser vicing, we will ...

  • Parasound A 51 - page 15

    TECHNICALL Y SPEAKING 13 Audio T rigger Sensitivity Adjustment The Audio Sensitivity Control sets the threshold of the audio trigger signal. Y ou can adjust this lev el from a maximum sensitivity of 50 mV (fully countercloc kwise) to a minimum sensitivity of 250 mV (fully cloc kwise). If you set this control to 50 mV , the A 51 might be falsely tri ...

  • Parasound A 51 - page 16

    TECHNICALL Y SPEAKING continued 14 hum (or 50 Hz hum in regions with 50 Hz A C). T he harmonics of these frequencies (1 20 Hz, 240 Hz, 480 Hz or 1 00 Hz, 20 0 Hz, 400 Hz) may add buzz in addi- tion to the hum. The ideal of z ero voltage ground for all the compo- nents in a system is practically impossible, because some resistance bet w een the grou ...

  • Parasound A 51 - page 17

    P ARASOUND A 51 DESIGN OVERVIEW 15 Circuit Designed by John Curl P arasound design consult ant J ohn Curl has been a legend among audiophiles and electronic engineers for decades. He pioneered measurements to cor re- late musical accuracy with the materials used in parts, work ed with world-class touring companies, has designed highly cov eted audi ...

  • Parasound A 51 - page 18

    P ARASOUND A 51 DESIGN OVERVIEW continued 16 The Driver Stage The driv er stage provides critical amplification for whic h we emplo y a complementar y matc hed pair of MOSFETs selected f or their tube-lik e sonic qualities. MOSFETs tend to generate less odd-order harmonic distortion than bipolar transistors. T his is import ant because odd-order di ...

  • Parasound A 51 - page 19

    P ARASOUND A 51 SPECIFICA TIONS Power Output - All Channels Driven 250 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 8 Ω 400 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 4 Ω Current Capacity 60 amperes peak per c hannel Slew Rate > 1 30 volts per microsecond Frequency Response 5 Hz - 1 0 0 kHz, +0/-3 dB at 1 wat t T otal Harmonic Distortion < ...

  • Parasound A 51 - page 20

    Parasound Pr oducts, Inc. 950 Batter y Str eet, San Francisco , CA 94111 415-397-7100 / Fax 415-397-0144 www .parasound.com ...

Manufacturer Parasound Category Stereo Amplifier

Documents that we receive from a manufacturer of a Parasound A 51 can be divided into several groups. They are, among others:
- Parasound technical drawings
- A 51 manuals
- Parasound product data sheets
- information booklets
- or energy labels Parasound A 51
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 Parasound A 51.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Parasound A 51, service manual, brief instructions and user manuals Parasound A 51. 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 Parasound A 51.

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A complete manual for the device Parasound A 51, 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 Parasound A 51 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Parasound A 51.

A complete Parasound 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 Parasound A 51 - 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 Parasound A 51, 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 Parasound A 51, that we can find in the current document
3. Tips how to use the basic functions of the device Parasound A 51 - which should help us in our first steps of using Parasound A 51
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Parasound A 51
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Parasound A 51 in a specific country, if it was not possible to solve the problem on our own.

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