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Sigtronics Sci-4 Intercom

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The all new SCI-4 from Sigtronics features dual squelch indicator lights and dual volume and squelch controls to control volume and squelch independently for front and back seats, crew/pilot isolate and pre-wired harness for easy installation. The SCI-4 is RFI and EMI immune and measures only 1"x 2-1/2". Includes all hardware and jacks needed for installation. SCI-S4/S6 Intercoms have the same features as SCI-4/6 Intercoms plus music inputs. 5-year warranty. Made in USA.
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A very good intercom. Its depth can present a problem depending on panel location vs yoke travel, and it has no On/Off depower, it requires external switch or breaker.

Vernon D
February 14, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is the Sigtronics SCI-4 Intercom a stereo unit?

The Sigtronics SCI-4 is a stereo unit. If you would like the stereo feature for the purpose of listening to music, please order part number 11-00424 as it includes a music jack.

Q: Any chance that this comes with the 4 sets of jacks and cables?? Is it TSO'd?

The Sigtronics SCI-4 place intercom does come with 4 sets of jacks and cables. It is also TSO'd.

Q: How long are the passenger wires on the Sigtronics SCI-4 Intercom? Any chance I can specify the lengths at the time of the order?

All of the wires are 4 feet. Custom lengths cannot be custom ordered but many people use 22 gauge wire for if they need longer lengths.

Q: Does the Sigtronics SCI-4 intercom box come with the face plate for mounting? If not, what is the part number?

Yes, the box will include the faceplate and mounting screws. as well as the jacks and wiring to connect it.

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