Parasound A 31 manual Rack Mounting Your Parasound a

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Rack Mounting Your Parasound A 31

To mount the A 31 into a 19" wide equipment rack, you must first attach its two “L” shaped rack mount brackets (included). With its four feet removed, the A 31 chassis and front panel height occupies four rack spaces (7" or 176 mm). When mounting equipment below the A 31, you will also need to allow about 1⁄8" below the unit for the bottom chassis screws.

To attach the rack mount brackets:

•Remove the three screws from each side of the A 31. These are arranged vertically, behind its front panel and in front of its first heatsink fin.

•Line up the three holes on each bracket with the three holes on the A 31 and reinsert the screws.

•Make sure the screws are tight because they will support the entire weight of the A 31 in the equipment rack.

Note: Tighten each bolt just enough to keep the unit secure in the rack to avoid deforming the shoulder washers. Eliminating metal-to-metal contact reduces the likelihood of creating a ground loop that might introduce hum into your system.

Asingle standard rack space is 1-3⁄4" (44mm) high in a 19" wide equipment rack. This measurement standard was developed by the EIA (Electronic Industries Association) so manufacturers of electronic components and equipment racks could build products in standardized heights that would fit in a uniform space. Please call your Parasound dealer or Parasound Technical Services if you need additional advice about rack mounting the A 31.

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Contents OWNER’S Guide Important Safety Instructions Table of Contents Important Warranty information Thank You for Choosing ParasoundParasound Staff Keeping Records for Future Reference Unpacking Your a 31 & Placement Guidelines AC Mains VoltageUnpacking Your a Rack Mounting Your Parasound a Audio Connections Audio Input ConnectionsSpeaker Terminals Speaker Wire Length and Gauge thicknessSpeaker Connections Correct Speaker Polarity is ImportantGain Control Settings When to Set the Gain Control Knobs Above or Below NormalAudio Position Automatic on/off Turn On OptionsManual Position 12V Position Automatic on/off12V In Jack AC Power CordVolt Jacks 12V Loop Out JackFront Panel Operation On-Off ButtonTechnically Speaking Balanced and Unbalanced LinesGround Loops Eliminating Hum and Buzz Parasound a 31 Design Overview Bare Speaker Wire EndsPower Supply Circuit Designed by John CurlAudio Circuit Path Topology Complementary ConfigurationRelay-Bypassed Soft Start Circuit Input StageTotal Protection DC Servos Output StageClass A-A/B Operation Total Protection RelaysNo sound from speakers Problems and RemediesUnit will not turn on Background Hum or HissRepair or Service Are You Having Difficulty?Specifications Parasound Products, Inc McKinnon Ave, San Francisco, CA
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