SCI Pilot Isolate Panel Mount Intercoms
SCI Pilot Isolate Panel Mount Intercoms Price range: $430.00 through $504.00
Back to products
SPA-4S Two or Four Place Stereo Intercoms
SPA-4S Two or Four Place Stereo Intercoms Price range: $363.00 through $391.00

Fast delivery within 72 Hours

Dual Audio Panel Intercom With Stereo Music Input

Price range: $751.00 through $789.00

SDB-Kit Designed for installation in aircraft using dual audio bus systems. The 2 to 8 place Intercom for Stereo Music.

  • SDB-K / SDB-KH

Frequently Bought Together

Why Pilots Trust AVIA Avionics

  • Free Ground Shipping Over $399

Enjoy fast UPS, USPS, or DHL delivery on qualifying orders.

  • Shipping Worldwide

We use DHL or UPS for worldwide shipments.  Some shipments may require special processing.

  • No Sales Tax

Sales tax only applies where required by law.

  • 5 Star Service, White Glove

Strong customer service with fast response times.

Talk to a Real Aviation Expert

Need help placing an order?

Description

Dual Audio Panel Intercom With Stereo Music Input

  • FAA TSO approved.
  • Independent music inputs and full stereo capability.
  • Supports 2 to 8 headset positions, two positions with ability to transmit.
  • Pilot fail safe feature allows pilot to always hear radios.
  • Installation hardware included, including jack kit and pre-wired harness.
  • WARRANTY: Five years parts and labor.
Dual Audio Bus Systems

The Sigtronics Dual Bus Kit (SDB-K) includes two Model SPA-4Si intercoms specifically designed for installation in aircraft using dual (separate) audio buss' systems (i.e. aircraft with two audio panels). The SPA-4Si units allow each pilot, operating separate radios, the convenience of voice activated inter cabin communication. In addition to operating their respective radio systems independently, the SPA-4Si units add independent music inputs and full stereo aviation headset capability. Optional passenger connections allow intercom and stereo music positions with radio receive – No radio transmit.

Adaptable System

The kit consists of two SPA-4Si intercoms (with the option of adding up to 4 more SPA-4Si units) each with their own operating controls and radio interface. An interconnect line allows intercom communication between the units yet keeps the VHF audio systems separate. When transmitting through their respective radios, each side will hear the other's transmission unless transmitting simultaneously. Radio transmission is also possible through either unit even when the units are "OFF".

The SPA-4Si units may also be used as a dual intercom system in aircraft without dual audio panels. This is convenient where it is desired to have separate conversations between pilots and passengers. Contact Sigtronics for information.

Compact and Lightweight

Reversible face plates are included for either vertical or horizontal mounting, circular mounting plates are also available. All hardware needed for installation, including jack kit and a pre-wired harness, is included. Each unit is only 4" x 2.5" x 1" in size and weighs 5.5 ounces for the chassis, and 7.0 ounces for the jacks and wiring.

High Noise Environment N Series

The SDB-KH kit has two model SPA-4SiH intercoms. The "H" version of the SPA-4Si has all the above features but is specifically configured for very high noise environments.

FeaturesSDB-KSPA-4SiSDB-KHSPA-4SiH
Headset Positions:8484
High Noise:NoNoYesYes
Stereo:YesYesYesYes
Size Each Unit:4" x 2.5" x 1"4" x 2.5" x 1"4" x 2.5" x 1"4" x 2.5" x 1"
Weight Unit:5.5 oz.5.5 oz.5.5 oz.5.5 oz.
Weight Jacks/Harness:7.0 oz. each7.0 oz.7.0 oz. each7.0 oz.
Warranty:5 Years5 Years5 Years5 Years

Documents

SDB-K / SDB-KH
SDB-K / SDB-KHInstallation, Operating, and Modification Instructions
Installation and Operating Instructions pdfModels: SDB-K and SDB-KH
Stereo Panel Mount Intercom System for Aircraft with Dual Audio Panels.
SDB Panel Template pdfModels: SCI, SDB, SPA, and Sport 200
Panel Templates for intercoms.
Radio Keyline Modification pdfModel: SPA, SDB, SCI and Sport Intercoms
For KMA-20 Audio Panels and ICOM A220 Radios.
John M.
John M.Customer
Great service, product delivered as expected. Communicates well to the customer.