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Parasound
A 51 manual
Models:
A 51
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Troubleshooting
Specifications
2PLACEMENT GUIDELINES FOR YOUR A
Balanced XLR Jacks and Their Pin Configuration
Before Connecting
bOn, Off and Fault/Protection Status Indicators
YOU SHOULD KNOW Turn Off Delay in the Audio Mode
Audio Trigger Sensitivity Adjustment
AC Power Connections
Ground Switch, set to up position
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Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111
415-397-7100 /
Fax
415-397-0144
www.parasound.com
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Contents
A 51 Amplifier
Owner’s Guide
THANK YOU
The Parasound Staff Unpacking Your A
Keeping Records for Future Reference
YOU SHOULD KNOW
TABLE OF CONTENTS
PLACEMENT GUIDELINES FOR YOUR A
CONNECTING A SURROUND CONTROLLER
CONNECTING YOUR SPEAKERS TO THE A
To attach the rack mount brackets
2PLACEMENT GUIDELINES FOR YOUR A
Rack Mounting Your Parasound A
Before Connecting
Balanced XLR Jacks and Their Pin Configuration
Left and Right Balanced Input Jacks
What You’ll Need
Ch 1-5Unbalanced Inputs
YOU SHOULD KNOW Write Down Your Connections
Before Connecting
What You’ll Need
CONNECTING YOUR SPEAKERS TO THE A
Speaker Wire Length and Gauge thickness
Speaker Terminals
Correct Speaker Polarity is Important
YOU SHOULD KNOW Turn Off Delay in the Audio Mode
6MANUAL AND AUTOMATIC TURN ON-OFFOPTIONS
Manual On-Offfrom the Front Panel
Before Connecting
CONNECTING AN EXTERNAL DC SOURCE FOR
AUTOMATIC TURN ON-OFF
Before Connecting
What You’ll Need
8UNDERSTANDING THE INDICATORS ON THE A
bOn, Off and Fault/Protection Status Indicators
c - g Channel Status Indicators
c - g All Indicators Illuminated
CONNECTING THE A 51 AC POWER CORD
AC Power Connections
110 V - 120 V or 220 V - 240 V Operation
Before Connecting
Main Power Fuse
10MAINTAINING YOUR A
TROUBLESHOOTING GUIDE
TROUBLE
PROBABLE CAUSE
REMEDY
Important Notice - Shipping the A
12SERVICING YOUR A
If All Else Fails -CallUs for Help
Audio Trigger Sensitivity Adjustment
Bare Speaker Wire Ends
Speaker Wires - Banana Plugs Instead of Bare Ends
Choosing Interconnect Cables and Speaker Wire
14TECHNICALLY SPEAKING continued
Ground Switch, set to up position
The Power Supply
Complementary Configuration
PARASOUND A 51 DESIGN OVERVIEW
Circuit Designed by John Curl
16PARASOUND A 51 DESIGN OVERVIEW continued
The Driver Stage
The Output Stage
Class A-A/BOperation
PARASOUND A 51 SPECIFICATIONS
Power Output - All Channels Driven
Dimensions
Power Requirement
