Parasound A 21 manual Loop Out Connector

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CONNECTING THE A 21 LOOP OUT JACKS

4

TO ANOTHER POWER AMPLIFIER’S INPUTS

Loop Out Connector

The Right and Left Loop Out jacks provide connections to route the same input signals from your preamplifier or surround controller to an additional power amplifier. In most instances, you won't use the loop out feature so you can skip this section.

What You’ll Need:

Left

• One pair of shielded interconnect cables with RCA plugs

Right

• An additional amplifier

 

 

RCA Plugs

Before Connecting

Leave the AC cord on the A 21 disconnected from the wall until you have made all of the connections in the system to prevent any surprise burst of sound.

Make sure that your interconnect cables are long enough so they are not strained or stretched once they are connected.

To Connect

1Plug one end of the cable to the right channel Loop Out jack on the A 21.

2Plug the other end of this cable to the right channel input jack on the other power amplifier.

3&4 Repeat steps 1 and 2 for the left channel.

INPUTS

RightLeft

POWER AMP

2

4

1

3

YOU SHOULD KNOW

These jacks eliminate the need for two “Y” connector cables to split the outputs from the two source channels between your A 21 and another amplifier. The A 21 Loop Out Jacks jacks provide the same signals that are received at either the balanced or the unbalanced inputs. Refer to Loop Out Jacks in the Technically Speaking section for more information about when to use the Loop Out Jacks.

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Contents Amplifier Parasound Staff Unpacking Your a Congratulations and Thank You for Choosing ParasoundKeeping Records for Future Reference 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 Speaker Terminals Speaker Wire Length and Gauge thicknessCorrect Speaker Polarity is Important IMPORTANT! Before Trying Bridged Mono Configuring the a 21 for Bridged Mono OperationTurn Off Delay in the Audio Mode Connecting an Active Audio Source for Automatic On-OffManual On-Off from the Front Panel 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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