TCAS Speakers

All speakers are TSO'd and approved by the FAA.

Four different models of TCAS speakers are available, three of which are approved by Boeing, and are installed on MD-11s, MD-717s, B-777s and B-767s.

P/N E4NA3F-1 (Boeing P/N BBN 7019-1)

  • 4-inch, 4 Ohm voice coil, with enclosure, seprately-wired volume control.
  • Installed in flight compartment overhead.
  • Reproduces all communications, navigation and warning (TCAS, CAWS, and EGPWS) systems audio.
  • Separate connector pins are provided to bypass volume control for TCAS and other warnings.
  • Approved for use on B-717, MD-90, and MD-11.

P/N E4NA3F-3

  • Essentially similar to P/N E4NA3F-1, except no volume control.
  • Designed for warning system audio (TCAS, CAWS, and EGPWS).

P/N E4NA3GG-1

  • 4-inch, two 14 Ohm voice coils, with enclosure, no volume control.
  • Installed in flight compartment side console.
  • Reproduces all communications, navigation and warnings (TCAS, CAWS, and EGPWS) systems audio. Second coil is used for predicted wind shear (PWS) warning.
  • Approved for use on MD-90.

P/N 4A3E-2 (Boeing P/N S222W220-201)

  • Dual channel with amplifier currently used on Boeing 777 and 767s.
  • 600 Ohm input impedance.
  • Channel one muting function.
  • Channel one and channel two input isolation.
  • Interfaces to flight interphone system, reproduces audio communication, and interfaces to warning systems audio.