Parasound A 21 User Manual

A 21 Amplifier Owner’s Guide

MANUAL AND AUTOMATIC TURN ON-OFF OPTIONS7YOU SHOULD KNOWTurn Off Delay in the Audio ModeWhen the music (audio signal) stops, the A 21 will remain turn

CONNECTING AN EXTERNAL DC SOURCE FOR A 21 AUTOMATIC TURN ON-OFF 812YOU SHOULD KNOWIf the device you want to use to control your A 21 doesn

BCONNECTING THE A 21 TO TRIGGER ANOTHER COMPONENT912YOU SHOULD KNOWIf the device you want your A 21 to control doesn’t have a 2.5 mm trigger output co

UNDERSTANDING THE INDICATORS ON THE A 21AC Present Indication When the A 21 is plugged into a live AC outlet, a soft blue halo glows behind its On-Off

AC Power Connections We recommend that you plug your A 21 into the same AC wall outlet or power strip that powers your other audio components, espe

MAINTAINING YOUR A 21Your Parasound A 21 power amplifier requires no periodic maintenance and has no user-serviceable parts

TROUBLESHOOTING GUIDE13A 21 will not turn off when audio signal is removedPROBABLE CAUSEPower cord is disconnectedREMEDYHum and / or buzz through spe

SERVICING YOUR A 2114If All Else Fails –Call Us for HelpCall your Parasound dealer or Parasound’s Technical Service Department toll free at

Audio Trigger Sensitivity AdjustmentThe Audio Sensitivity Control sets the threshold of the audio trigger signal. You can adjust

TECHNICALLY SPEAKING continued16Choosing Interconnect Cables and Speaker WireWe are often asked to recommend specific interconnect cables and

1THANK YOU!Congratulations and Thank You for Choosing Parasound Your new Parasound Halo Series A 21 power amplifier presents the latest advancemen

PARASOUND A 21 DESIGN OVERVIEW17chosen for their low Equivalent Series Resistance (ESR) and dielectric absorption. In addition, these filter cap

PARASOUND A 21 DESIGN OVERVIEW continued18Total Protection - DC ServosDirect Current (DC) burns out speakers. Every power amplifier must have some way

Power Output - Both Channels Driven 250 watts RMS x 2, continuous, 20 Hz - 20 kHz, 8 Ω400 watts RMS x 2, continuous, 20 Hz - 20 kHz, 4 ΩPower

Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111415-397-7100 / Fax 415-397-0144 www.parasound.com

PLACEMENT GUIDELINES FOR YOUR A 21_________________________________________________________________________________CONNECTING A STEREO PREAMPLIFIER OR

PLACEMENT GUIDELINES FOR YOUR A 21 Power ampliers are usually heavier and generate more heat than other components. To avoid damage to the A 21

XLR ConnectorsMaleFemaleYOU SHOULD KNOWBalanced XLR Jacks and Their Pin ConfigurationThe balanced inputs of the A 21 use XLR jacks that con

Left and Right Unbalanced Inputs Use these inputs if your preamplifier or surround controller doesn’t have balanced output connectors or if you si

Loop Out ConnectorThe Right and Left Loop Out jacks provide connections to route the same input signals from your preamplifier or surround controller

StrippedAWG wireDual Banana PlugCommon Speaker ConnectorsSingle Banana PlugSpade LugRed usuallydesignates rightThe GND notchsignifies groundor speaker

CONFIGURING THE A 21 FOR BRIDGED MONO OPERATION6YOU SHOULD KNOW IMPORTANT! - Before Trying Bridged Mono You should not connect a speaker