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
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 713 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Jose
Birmingham, US
★★★★★ 5
Nice shirt
Color: Navy Blue-square, Size: X-Large
Great shirt, I got this for a graduation ceremonia, it looking nice and the fabric is fresco and light.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
T
Verified Purchase
Thom Linders
Omaha, US
★★★★★ 5
First class fit and comfort.
Color: Navy Blue-square, Size: Medium
Great fit, comfortable and light. Perfect way to upgrade from tshirts. Also a great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
J
Verified Purchase
Joey Joe
Bozeman, US
★★★★★ 3
The liner of the shirt can be unsightly with the neck worn open
Color: Black-polka Dots, Size: XX-Large
Be warned, if you get black, the shirt may actually be white inside.  I ordered the black with white poka dots.  The shirt was nice enough an would have looked okay completely buttoned to the top, however, if you wear the neck open like the model shows in the photos, the shirt is not like that.  The shirt has an unsightly white liner which totally shows if you wear the neck unbuttoned at all.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 11, 2025
A
Verified Purchase
Agatha Marie
San Leandro, US
★★★★★ 5
The shirts run true to size and are very well made.
Color: Wine Red-polka Dots, Size: 3X-Large
I want the company COOFANDY and the customers who are considering buying these men's wrinkle free men's shirts for casual business wear, to know that the shirts are beautiful. The material is perfect, and they are made exceptionally well! One of the two shirts that I bought for my husband looks great on him. I had to buy one in a size 2x and one in a size 3x due to the reviews on Amazon's website, where so many of the reviewers stated that the size that they bought ran too small, while other reviewers said the shirt runs too large. My husband tried on the 2x, and it fit him perfectly, which was great because he always wears a 2x. The reason that I am returning them both is that these shirts are tuck-in shirts, and my husband only wears shirts that do not have to be tucked in, such as straight-bottom shirts. I showed him the picture of the shirt in the ad to prove that the models wore them out, not tucked in, but he said the style is wrong for wearing this shirt on the outside, and that he would not be able to wear it. I am so sorry, but I had to return them as he would not ever wear them. But I wanted you, COOFANDY, and your customers to know that the shirts are well worth the money and are just beautiful!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
M
Verified Purchase
Missy Davis England
Massapequa, US
★★★★★ 5
Perfect fit for my husband
Color: Army Green, Size: Large
Very thick but it's cool, comfortable, no shrinking when washed and no fading. Love this color and the quality of material for the price is top of the line. I will be ordering other colors. My husband really enjoys wearing this and it fits perfectly. Thank you for the excellent work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

recommand products