Parasound A 21 manual Mm sub-mini plug

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CONNECTING AN EXTERNAL DC SOURCE

8

FOR A 21 AUTOMATIC TURN ON-OFF

 

If you want to automatically turn on and off the A 21 with an external DC voltage, choose the DC Triggering option by moving the Auto Turn On switch on the rear panel to its lower 12V position.

What You’ll Need:

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

 

• A “control” component with +9Vdc to +12Vdc trigger voltage

2.5 mm sub-mini plug

 

Before Connecting

Remove Power to all the components in your audio system.

Make sure the Auto Turn On switch on the A 21 rear panel is in its 12V (down) position.

To Connect

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

2Plug the other end of this wire into the external DC source.

1

2

Input

CONTROL COMPONENT

YOU SHOULD KNOW

If the device you want to use to control your A 21 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.

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Contents Amplifier Keeping Records for Future Reference Congratulations and Thank You for Choosing ParasoundParasound Staff Unpacking Your a Amplifier Rack Mounting Your Parasound a Placement Guidelines for Your aWhat You’ll Need Before ConnectingBalanced XLR Jacks and Their Pin Configuration Left and Right Balanced Input JacksInterconnect Cables and Their Color Codes Left and Right Unbalanced InputsLoop Out Connector Correct Speaker Polarity is Important Speaker Wire Length and Gauge thicknessSpeaker Terminals IMPORTANT! Before Trying Bridged Mono Configuring the a 21 for Bridged Mono OperationManual On-Off from the Front Panel Connecting an Active Audio Source for Automatic On-OffTurn Off Delay in the Audio Mode Mm sub-mini plug Connecting the a 21 to Trigger Another Component Ground Switch On, Off and Fault/Protection Status IndicatorsLeft and Right Channel Status Indicators High-Temp Indicator120 V or 220 V 240 V Operation AC Power ConnectionsMaintaining Your a Main Power FuseTrouble Probable Cause Remedy Troubleshooting GuideImportant Notice Shipping the a Procedure for Returning Your a 21 to Parasound for ServiceServicing Your a If All Else Fails -Call Us for HelpBalanced and Unbalanced Lines Audio Trigger Sensitivity AdjustmentBare Speaker Wire Ends Technically SpeakingGain Controls Choosing Interconnect Cables and Speaker WireGround Loops Eliminating Hum and Buzz Loop Out JacksParasound a 21 Design Overview Total Protection DC Servos Driver StageOutput Stage Class A-A/B OperationParasound 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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