Parasound A 21 manual Connecting the a 21 to Trigger Another Component

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CONNECTING THE A 21 TO TRIGGER ANOTHER COMPONENT

B

Whenever the A 21 is turned on either manually or automatically, there is 12 Vdc present at its own DC Trigger Out jack so it can trigger additional amplifiers or other components on and off.

What You’ll Need:

• A cable with a 2.5 mm sub-mini plug on each end

 

(in addition to the one provided with the A 21)

2.5 mm sub-mini plug

• A component that can be triggered with an external

+9 Vdc to +12 Vdc source. The A 21 DC Trigger output

 

provides up to 150 mA of current

 

Before Connecting

Remove power to all the components in your audio system.

To Connect

1Plug one end of the trigger wire into the 12V Output jack on the A 21.

2Plug the other end of this wire into the component that you want the A 21 to trigger.

1

2

Input

COMPONENT TO CONTROL

YOU SHOULD KNOW

If the device you want your A 21 to control 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 stripe is positive and the lead without the stripe is negative.

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Contents Amplifier Congratulations and Thank You for Choosing Parasound Parasound Staff Unpacking Your aKeeping Records for Future Reference Amplifier Placement Guidelines for Your a Rack Mounting Your Parasound aBefore Connecting Balanced XLR Jacks and Their Pin ConfigurationLeft and Right Balanced Input Jacks What You’ll NeedLeft and Right Unbalanced Inputs Interconnect Cables and Their Color CodesLoop Out Connector Speaker Wire Length and Gauge thickness Speaker TerminalsCorrect Speaker Polarity is Important Configuring the a 21 for Bridged Mono Operation IMPORTANT! Before Trying Bridged MonoConnecting an Active Audio Source for Automatic On-Off Turn Off Delay in the Audio ModeManual On-Off from the Front Panel Mm sub-mini plug Connecting the a 21 to Trigger Another Component On, Off and Fault/Protection Status Indicators Left and Right Channel Status IndicatorsHigh-Temp Indicator Ground SwitchAC Power Connections 120 V or 220 V 240 V OperationMain Power Fuse Maintaining Your aTroubleshooting Guide Trouble Probable Cause RemedyProcedure for Returning Your a 21 to Parasound for Service Servicing Your aIf All Else Fails -Call Us for Help Important Notice Shipping the aAudio Trigger Sensitivity Adjustment Bare Speaker Wire EndsTechnically Speaking Balanced and Unbalanced LinesChoosing Interconnect Cables and Speaker Wire Ground Loops Eliminating Hum and BuzzLoop Out Jacks Gain ControlsParasound a 21 Design Overview Driver Stage Output StageClass A-A/B Operation Total Protection DC ServosParasound a 21 Specifications Parasound Products, Inc Battery Street, San Francisco, CA

A 21 specifications

The Parasound A 21 is a high-performance power amplifier renowned for its exceptional audio quality and build integrity. It is designed to meet the demands of audiophiles and music enthusiasts, aiming to deliver an unparalleled listening experience. This amplifier stands out with a robust power output, delivering 250 watts per channel into 8 ohms and 400 watts into 4 ohms, providing ample power to drive a wide range of loudspeakers.

One of the key features of the Parasound A 21 is its ultra-linear Class AB amplification. This technology allows the amplifier to achieve high power without compromising on sound quality. The Class AB design is known for its low distortion and high efficiency, making it capable of reproducing dynamic music with clarity and precision. The A 21 also incorporates a toroidal transformer, which helps in producing clean power and minimizes electrical interference, ensuring that the sound remains unaffected by fluctuating power conditions.

The build quality of the A 21 is exceptional, with a sturdy chassis designed to minimize vibrations and enhance performance. The amplifier is housed in a sleek, attractive enclosure that not only looks elegant but also provides adequate heat dissipation. This is a crucial aspect, as it ensures the amplifier operates efficiently without overheating during extended listening sessions.

In terms of connectivity, the Parasound A 21 features balanced XLR and unbalanced RCA inputs, allowing users to integrate it seamlessly into various audio systems. The amplifier also has a 12V trigger input, enabling remote operation which can be a significant convenience for users with complex audio setups.

The A 21 is built with high-quality components, including high-current power supply capacitors and output transistors, further enhancing its reliability and performance. Its sound signature is characterized by an expansive soundstage, detailed mids, and deep, controlled bass, making it suitable for a diverse range of music genres.

For those seeking an amplifier that combines power, precision, and aesthetic appeal, the Parasound A 21 is a standout choice. It delivers an impressive blend of technological advancements and user-friendly features, ensuring that audiophiles can enjoy their favorite music as it was meant to be heard. Overall, the A 21 exemplifies Parasound’s commitment to excellence and remains a trusted option in high-fidelity audio systems.
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