Pro Intercom AD903 2-to-4 Wire Adaptor Active Transformer Isolation Audio In & Out
SKU: 17440818437

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

Sale price$320.40 Regular price$356.00
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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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Teresa
Fort Morgan, US
★★★★★ 5
Works great
Size: 8.8" x 9.3" x 1.1"
Good filter
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 15, 2025
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Verified Purchase
tonyb
Lexington, US
★★★★★ 5
Fit as stated
Size: 8.8" x 9.3" x 1.1"
Perfect fit for my 2013 Honda and price was great
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Reviewed in the United States on April 28, 2025
S
Shire23
Lexington, US
★★★★★ 5
Great Replacement Cabin Air Filters for my 2008 Honda Civic
Size: 2Pcs, Size: 2Pcs
Item Reviewed: CF10134 Cabin Air Filter with Activated Carbon Replacement for CP134, Fit for Honda Accord/Civic/Odyssey/CR-V and Acura MDX/TSX/TLX/RDX/Ridgeline (2 pack) ℹ️ Summary I picked these up because I needed some replacement cabin air filters for my 2008 Honda Civic. These seem like decent quality and they were a perfect fit in my car. For $15 at time of order for two air filters it was a solid deal that I can glad recommend to others. I hate writing short reviews, but there’s not much else to say about these. Here is how I rate items: 5 ⭐️ = Completely exceeds expectations. 4 ⭐️ = Works well with minor concerns. 3 ⭐️ = Does the job, nothing special. 2 ⭐️ = Some things work, but lots of issues. 1 ⭐️ = Didn’t work well, not worth it.
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Reviewed in the United States on September 30, 2025
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TLau
Whiting, US
★★★★★ 4
Good fit for Acura MDX
Size: 8.8" x 9.3" x 1.1"
This is an air cabin filter that will fit many cars, and in my case a 2019 MDX. Since this kind of filter is not doing anything critical like keeping dirt out of an engine, I shop around for non-OEM filters for something that strikes a balance between price versus performance. This filter just filters out dust in a car cabin, and when we’re not in our cars, we don’t have the benefit of an air filter when we are walking around outdoors. At a fraction of the price of an Acura filter, this filter seems to strike that balance. The filter media looks sturdy and is embedded with charcoal to help absorb odors. Installation is very straightforward in my MDX, and similar in most cars. There is a compartment door inside the glovebox that first must be removed before changing the filter. Pay attention to the direction flow arrow that shows which way the filter should be installed. Overall I am satisfied with this filter. It is inexpensive, fits perfectly, and seems to do the job just fine. It is definitely worth trying if you are trying to save money.
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Reviewed in the United States on October 12, 2024
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Shop by Interest
Port Orchard, US
★★★★★ 5
These filters do the job
Size: 2Pcs
Fits great in my '08 Accord LX and my '19 Accord Sport 2.0t. They filter air well and are easy to install like any cabin air filter in a Honda. I am pleased. Good value for the price.
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Reviewed in the United States on October 8, 2025

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