SKU: 17440818437

Pro Intercom AD903 2-to-4 Wire Adaptor Active Transformer Isolation Audio In & Out

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Description

Pro Intercom AD903 2-to-4 Wire Adaptor Active Transformer Isolation Audio In & OutThe AD903 has many functions for getting various levels of audio into an intercom circuit, or getting the intercom audio "traffic' out to an amplifier or recorder. It is also useful as a 2 to 4 wire adaptor for connecting 4 wire communications into and out of a standard intercom circuit. Both the input and the output are transformer isolated from whatever devices are connected. The wide range of level adjustments will accommodate almost any audio

The AD903 has many functions for getting various levels of audio into an intercom circuit, or getting the intercom audio "traffic' out to an amplifier or recorder.

It is also useful as a 2-to-4 wire adaptor for connecting 4-wire communications into and out of a standard intercom circuit.

Both the input and the output are transformer isolated from whatever devices are connected. The wide range of level adjustments will accommodate almost any audio signal.

The 'Null" control allows you to minimize or even eliminate any "cross-talk' between the input and output.

The input transformer is a studio grade device and will not degrade any audio that you feed it.

Access to the input and output are via a rear panel 4-pin XLR. Pins 1 and 2 are input and pins 3 and 4 are output.

The AD903 connects to the intercom circuit just as a beltpack does, through a rear panel 3-pin XLR.

The AD903 is also commonly used for connecting to a video camera CCU where a built-in intercom is provided that is not compatible with Pro Intercom or any of the other 200 Ohm unbalanced intercom systems.

The AD903 is powered by the intercom system and requires no batteries or separate power supply.

  • Transformer Isolated I/O
  • Use as 2-to-4 Wire Adapter
  • 4-pin XLR Input & Output
  • No Power Supply Needed
  • Power requirement:
    • 24 - 30 VDC, 15-25 mA
  • Input:
    • -60 to +30 dBm into 10K ohm nominal, balanced and floating
  • Output:
    • -60 to +30 dBm from 200 ohm nominal source, balanced and floating
  • Sidetone rejection:
    • 50 dBA
  • Audio bridging impedance (to the intercom system):
    • 200 ohm unbalanced
  • Size:
    • 3.70 x 4.30 x 2.50 in.(93.98 x 109.22 x 63.5 mm)
  • Weight:
    • 14.5 oz (0.411 Kg)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 17440818437

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4.2 ★★★★★
Based on 28 reviews
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Verified Purchase
Pat M
New York, US
★★★★★ 3
Frustrating Opener
Color: Black+Grey
I love and hate these at the same time! I have had several and this one will not stop once it has started! Even though there is a button that says start/stop whenever you push it, it just starts it all over again and I can’t get the lid out. Very frustrating.
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Reviewed in the United States on March 25, 2026
M
Verified Purchase
Marta Lora
Natrona Heights, US
★★★★★ 5
Effortless opening and no sharp edges.
We recently went camping and realized we really needed a reliable opener, and this one was a lifesaver. It’s incredibly easy to use, you just set it on the can, press the button, and it does all the work for you. I love that it leaves a smooth edge and feels sturdy, plus the black finish looks really nice. This has quickly become one of my favorite gadgets for making meal prep much faster, whether at home or on a trip.
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Reviewed in the United States on May 10, 2026
G
Verified Purchase
GardenGirl
Whiting, US
★★★★★ 5
So simple to use, I'm amazed
Color: Black
Wonderfully helpful. Description is accurate, shipping was quick. I saw a few poor comments, but I have none so far! The can opener has opened cans of several sizes, from tomato paste to large cans of tomatoes; soup cans to strangely shaped. It's opened 30 or so already without loss of power. It's a little noisy, but about equal to that of a stand up opener. It fits in my drawer, which is less deep than most kitchen drawers. Most of all, it's beyond easy to use for arthritic hands. The ONLY CHALLENGE I have is that it sometimes fails to stop when it should. MANUFACTURER: if you read this and have advice, please share. At this point, I'd say this is a great value for the money.
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Reviewed in the United States on February 18, 2026
S
Verified Purchase
SA
Cuba, US
★★★★★ 5
Cordless can opener.
Color: Black
Works great and has been very reliable, open many cans on a single charge, would recommend.
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Reviewed in the United States on June 1, 2026
K
Verified Purchase
karla deloatch
Louisville, US
★★★★★ 1
Pleased be careful
Color: Black
Please be very careful when using this. After using it 2 times it opened cans just fine. Then it stop opening cans and will make hair like strains of metals and one would think its hair and pull on it thus Cutting your fingers open. That’s what happened to me. Please be careful.
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Reviewed in the United States on May 16, 2026

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