ADA-21S STEREO AUDIO DISTRIBUTION AMPLIFIER

ADJUSTMENTS:

The ADA-21S has no adjustments other than the front panel gain control.

SPECIFICATIONS:

INPUT:

Dual channel, Balanced, +24 dBm Maximum

INPUT IMPEDANCE:

30 kΩ Balanced, DC coupled

OUTPUT:

+24 dBm Maximum

OUTPUT IMPEDANCE:

100Ω Balanced, DC coupled

LEFT/RIGHT SEPARATION:

All outputs driven into 600Ω, unused input terminated.

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Greater than 80 dB, 20 Hz to 20 KHz

HUM and NOISE:

less than -80 dBm at Unity Gain, 22Hz to 22Khz filter

 

less than -65 dBm at +27 dB Gain, 22Hz to 22Khz filter

THD+N:

Into 600Ω, 22Hz to 22Khz filter, 0dBm to +24 dBm

 

less than 0.05% 20 Hz to 20KHz)

IND (SMPTE 4:1 60Hz/7KhZ):

same conditions as THD+N, less than 0.02%

GAIN RANGE:

(-6) to +24 dB in 6dB steps,±3dB vernier when terminated into 600Ω.

GAIN VARIATION:

±0.3 dB

CMR:

Greater than 70 dB at 60 Hz, 60 dB at 20 KHz

 

0dBm to +24dBm

RESPONSE:

Into 600Ω, ±0.2 dB, 20 Hz to30 KHz

TECHNICAL MANUAL:

A manual including schematics, circuit description, parts list and setup guide is available upon request. This information is intended for the service of the module. Modules should be serviced by Qualified Personnel only! Sigma Electronics, Inc. recommends service to be performed by our Factory Service Center.

All specifications, drawings, dimensions, weights and other details are subject to change without notification. Information is intended to give a general performance and operation guideline of the product.

Sigma Electronics, Inc.; P.O.Box 448; 1027 Commercial Avenue;

East Petersburg, PA 17520-0448

Main Office: Tel: (717) 569-2681 Fax: (717) 569-4056

 

REV1 JUN00

ADA-21S

ADA-21

Doc. No. – 14466

 

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Sigma ADA-21S instruction manual Adjustments, Specifications, Technical Manual
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ADA-21S specifications

The Sigma ADA-21S is an advanced digital audio device that has gained acclaim for its sophisticated features, robust performance, and user-friendly interface. Designed primarily for audiophiles and professionals alike, the ADA-21S combines state-of-the-art technology with functionality, making it a standout choice in the digital audio landscape.

One of the key features of the Sigma ADA-21S is its high-resolution audio playback capability. Supporting audio formats up to 32-bit/768kHz and DSD256, the ADA-21S ensures users can enjoy music with exceptional clarity and detail. This high sampling rate allows for a more immersive listening experience, where every note and nuance is captured, making it a perfect device for critical listening and professional audio work.

Incorporating advanced digital signal processing (DSP) technology, the ADA-21S allows for unparalleled audio manipulation. Users can apply various filters and effects, achieving precisely the sound they desire. The device also includes multiple input options such as USB, optical, and coaxial, making it versatile and compatible with a range of audio devices. The seamless connectivity options ensure that users can easily integrate the ADA-21S into their existing audio systems without any hassle.

The Sigma ADA-21S also features a sophisticated built-in headphone amplifier, providing audiophile-grade sound directly to headphones. This ensures that listeners can experience high-quality sound even when using portable devices. Moreover, its balanced output delivers superior audio performance with reduced noise and improved fidelity, enhancing the overall listening experience.

Another notable characteristic of the ADA-21S is its high-quality build. Featuring a robust chassis, the device is designed to minimize interference and provide durability. The sleek design also includes a user-friendly interface, complete with an intuitive screen that simplifies navigation through various settings and audio formats.

Additionally, the Sigma ADA-21S supports various file types, including FLAC, WAV, MP3, and AAC, making it a versatile choice for users with diverse audio libraries. The device’s ability to process and play these formats effortlessly contributes to its reputation as a reliable digital audio solution.

In summary, the Sigma ADA-21S stands out as a premier digital audio device, offering high-resolution playback, advanced signal processing capabilities, versatile connectivity options, and exceptional build quality. It caters to both casual listeners and audio professionals, ensuring a rich and detailed listening experience across a wide range of audio formats. Whether used in a home setup or as a portable solution, the ADA-21S is an impressive tool for anyone serious about their audio experience.
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