Parasound Halo A 52 Owner's Manual
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Parasound Halo A 52 Owner's Manual

Parasound owner's guide stereo amplifier a 52
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A 52 Amplifier
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Summary of Contents for Parasound Halo A 52

  • Page 1 A 52 Amplifier Owner’ s Guide...

  • Page 2: Thank You

    If you’re eager to get up and running right away, simply follow the basic step-by-step instruc- tions to connect and operate the A 52. If you want to learn about some of the technical and design aspects of your A 52, refer to the Technically Speaking and Parasound A 52 Design Overview sections in the back of the manual.

  • Page 3: Table Of Contents

    A 52 Amplifier PLACEMENT GUIDELINES FOR YOUR A 52 CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52 CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 52 CONNECTING YOUR SPEAKERS TO THE A 52...

  • Page 4: Placement Guidelines For Your A

    Rack Mounting Your Parasound A 52 To mount the A 52 into a 19" wide equipment rack, you must first attach its HRA 3 rack mount brackets (not included). With its four feet removed, the A 52 chassis and front panel height occu-...

  • Page 5: Connecting A Surround Controller

    3 screws instead of XLR jacks. These are compatible with the A 52 as long as you match the bare wires to the corresponding pins on the XLR plug: + to pin 2, - to pin 3, and Ground to pin 1.

  • Page 6: Connecting A Surround Controller

    Unbalanced (lower) position and the Ground switch is in its Normal (lower) position. To Connect 1 Plug one end of the cable into the Unbalanced Ch 1 Input jack on the A 52. 2 Plug the other end of the cable into the unbalanced output jack for the channel on your surround controller that you wish to correspond to Ch 1 on your A 52.

  • Page 7: Connecting Your Speakers To The A 52

    Remove power to all the components in your audio system. To Connect When connecting your speakers you need to keep in mind which channel of the A 52 you connected to each channel on your surround controller. You can write these down on page 10.

  • Page 8: Manual And Automatic Turn On-Off Options

    Manual On-Off from the Front Panel If you want to manually turn on and off the A 52 at any time, you need to first select the Manual On- Off option by placing the Auto Turn On switch (on the rear panel) to its middle Man (Manual) position.

  • Page 9: Connecting An External Dc Source For Automatic On-Off

    Qualified Service Personnel. YOU SHOULD KNOW If the device you want to use to control your A 52 doesn’t have a 2.5 mm trigger output connector, you can cut one plug off the cable and terminate the end as required. The lead with the red stripe is positive and the lead without the stripe is negative.

  • Page 10: Connecting The A 52 To Trigger Another Component

    Remove power to all the components in your audio system. To Connect 1 Plug one end of the trigger wire into the 12 2 Plug the other end of this wire into the component that you want the A 52 to trigger. Ch 1 Parasound Products, Inc.

  • Page 11: Understanding The Indicators On The A 52

    AC Present Indication When the A 52 is plugged into a live AC outlet, a soft blue halo glows behind its On-Off button and its red “P” Badge glows faintly. These indicate that the unit is plugged into a live AC outlet, even when it is turned off.

  • Page 12: Connecting The Ac Power Cord

    110 V - 120 V or 220 V - 240 V Operation The A 52 can operate on either 110 V - 120 V or 220 V - 240 V. The correct line (or “AC mains”) voltage for your unit is marked on its carton. Changing the A 52’s operating voltage involves rewiring internal connections for both its main power transformer and standby power trans- former, plus changing fuse values.

  • Page 13: Maintaining Your A 52

    MAINTAINING YOUR A 52 Your Parasound A 52 power amplifier requires no periodic maintenance and has no user- serviceable parts inside. To 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 fewdrops of water or glass cleaner.

  • Page 14: Troubleshooting Guide

    A 52. If the same speaker remains distorted, the speaker or its wire is damaged. If the other speak- er distorts, the problem may be with the A 52, the surround controller, or a source component Problem with surround controller Switch the input cables.

  • Page 15: Servicing Your A 52

    Procedure for Returning Your A 52 to Parasound for Service If Parasound determines that you should send your A 52 to Parasound, you will be given a Return Authorization (RA) number. This RA number must be clearly marked on the outer carton only.

  • Page 16: Technically Speaking

    50 mV (fully counterclockwise) to a minimum sensitivity of 250 mV (fully clockwise). If you set this control to 50 mV, the A 52 might be falsely triggered on by non-musical or noisy signals that can appear in the system, such as when you switch preamp inputs at high volume levels.
  • Page 17 Extra wash- ers are available from rack manufacturer Middle Atlantic Products, www.middleatlantic.com. 3. Use the Ground switch on the A 52 to eliminate most ground loops. This separates the A 52 nal input ground from its chassis ground to isolate unwanted voltage in the ground shield of the unbalanced (RCA) input cable.

  • Page 18: Parasound A 52 Design Overview

    AC power lines from computers and other appli- ances in the home. Relay-Bypassed Soft Start Circuit When the A 52 is first turned on, there is a significant amount of in-rush current required to charge the enor- mous power supply capacitors. In order to suppress...
  • Page 19 It operates outside the audio signal path to keep the DC offset at the output of the A 52 at a constant 0.00 Vdc. The results are startling clarity, freedom from listening fatigue, and formidable bass response.

  • Page 20: Parasound A 52 Specifications

    PARASOUND A 52 SPECIFICATIONS Power Output - All Channels Driven 125 watts RMS x 5, continuous, 20 Hz - 20 kHz, 8W 225 watts RMS x 5, continuous, 20 Hz - 20 kHz, 4W Current Capacity 30 amperes peak per channel Slew Rate >...
  • Page 21 Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111 415-397-7100 / Fax 415-397-0144 www.parasound.com...

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