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[Discountnd] Generation 3rd Audio Isolator - Duo Channels
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[Discountnd] Generation 3rd Audio Isolator - Duo Channels

Upgraded in the hardware, and improved in the performance, Add a switch to select the input signal; Excellent performance in Frequency Response Characteristics of Full Range (20-24K Hz).



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Upgraded in the hardware, and improved in the performance, Add a switch to select the input signal; Excellent performance in Frequency Response Characteristics of Full Range (20-24K Hz).



2018Edition Standard


  AI80-NG

  Audio Isolator - Duo Channels


Characteristic


-Comprehensive hardware upgrade, significantly improved performance, and the addition of side switches for selecting input signals.

-Excellent frequency response performance in the full frequency band of 20-20KHz, with a frequency response deviation of only -0.1~+0.05dB; The lowest distortion is only 0.00122%, which is excellent in the industry.

-Upgrade and shield high-precision variable pressure equipment, greatly improving frequency response characteristics.


Function 



  1. Eliminate potential differences caused by unequal induced potentials in audio equipment with different phase lines and grounding points.


  2. Convert unbalanced signals into balanced signals transmitted on differential Canon lines. (The former has a transmission distance of less than 20 meters, and the distance in places with severe electronic interference is shorter; the latter can reach a transmission distance of over 100 meters.)


  3. Eliminating 50Hz AC current sound in sound systems in scenarios where a computer is connected to a projector or LED display screen; Replace instruments in the performance scene, avoid lowering the volume on the mixing console, and avoid current shock and noise when switching circuits or instruments; Electrical isolation and circuit protection in professional scenarios such as signal transmission by television stations or other broadcasting institutions;


  4. The side switch function can choose to adapt input signals: TS unbalanced signal is set to lift, TRS balanced signal is set to GND.

Parameters


Channel QTY

2


Frq band

20Hz ~ 20KHz


Output signal

Banlance signal


First level ratio

600：600


Gain

1：1


Freq. response deviation @20Hz

-0.001dB（@20Hz）


Freq. response deviation @20KHz

0.025dB（@20Hz）


Distortion @1V

0.00122%


Distortion @10V

0.015%


Loss attenuation  @600Ω

-0.5dB


Loss attenuation @10KΩ

0.1dB


Adapt input signal selection

Support


Shield grounding selection

Support


ATT

None.


Core transformer componentsHigh precision transformer components


Characteristic Curve


1-Frequency Response




2-THD+N vs Input signal amplitude





3- Linearity




4-Phase vs Freq.




5-THD+N vs Freq.




6-FFT

Application Scenarios


Sound equipment in different locations


In professional audio systems, the uneven length of power lines at various points of equipment leads to differences in grounding resistance, resulting in ground potential and voltage differences between devices, which can easily cause audio noise; There may also be an impact sound when the signal cable is unplugged or unplugged from the device, which may cause the interface chip of the device to be destroyed and the device to be damaged in severe cases.



LED splicing large screen


Each module of the LED screen is equipped with an independent power supply, which includes a boost circuit. For splicing large screens, because LED large screen systems contain numerous boost power sources, the ground potential of the power supply system will inevitably be unbalanced. At this time, if there is an audio system, including amplification and mixing stations, it will definitely cause sand and sand current noise. This scenario requires the resolution of an audio isolator.



Long distance transmission between the mixing console and the computer


The 3.5mm interface of a computer's unbalanced transmission output is susceptible to external electronic devices and radio interference, such as power cords. If they are close to unbalanced cables, they will produce buzzing noise. Old style non LED stage lighting (such as spotlights and dimmers) may also increase signal interference. At this point, it is necessary to add an isolator on the output side of the computer to convert unbalanced signals into balanced signals, ensuring that long-distance transmission is not affected by interference.



Between the mixing station and the broadcasting vehicle


On site broadcasting vehicles usually use diesel engines for self generation, and the power supply is based on virtual ground potential; The audio station is powered by mains electricity, and there may be a huge potential voltage difference between the two, which can generate electric current sound or impact potential to damage equipment, affecting activities and causing losses. For safety reasons, it is necessary to use audio isolation protectors to prevent current and sound noise, and to protect the mixing tables at both ends from being burned out.



Between the mixing console and the instrument


During the band's performance, the distance between the electric guitar and the mixing console is relatively long (the cable exceeds 10 meters), and the on-site interference factors are uncontrollable. At this time, DI (using an isolator for emergency) needs to be used. DI (isolator) has two purposes in this scenario:

1. Convert the unbalanced high impedance interface of the electric guitar into a balanced low impedance interface suitable for connecting to the mixing console, and impedance matching avoids the loss of bass signals.

2. Unbalanced to balanced transmission avoids noise problems caused by excessively long cables.

3. Audio isolation protection ensures that there is no current surge due to ground potential difference between the front and rear devices, preventing the impact of signal wires when inserting and unplugging electroacoustic instruments.

Documents


《E2_GAODIMIC_Full Sound Range Audio Isolator（AI180-NG）_20190627》