Part SPA-400

Sigtronics · 54 listings from 5 suppliers (Aircraft Parts & Salvage, BAS Part Sales, CostAero, Safe Skies Parts, Texas Air Salvage) · $22.00 – $225.00. Prices refresh weekly.

from $22
from $30
from $50

Cross references

Supplier data links this part number to: ASIS

Price trend · weekly low by condition

WeekConditionListingsLowAvg
2026-W35used 33$50 $113
2026-W35core 4$30 $44

Description

SPA-400 Four Place and SPA-600 Six Place Intercoms FAA TSO approved. Pilot fail safe feature allows pilot to always hear radios. Works with all brands of General Aviation headsets. Reversible face plate included for vertical or horizontal mounting. Radio priority assures that ATC hears only the crew member transmitting. Installation hardware included, including jack kit and pre-wired harness. WARRANTY: Five years parts and labor. The Intercom That Set The Standard Sigtronics pioneered the voice activated intercom market in 1974 and continues to deliver value and performance today in the 4 or 6 place FAA TSO approved SPA-400 / SPA-600 intercom series. With fail safe features that allow pilots to always hear the radio even if the intercom is off, and radio priority that assures ATC only hears the crew member transmitting, the SPA intercom series is the standard by which all others are judged. Individual Mic Bias Allows The Use of Different Brands of Headsets General aviation headset microphones draw power from the intercom or radio mic line. Some poorly designed intercom systems hook all the headsets to one mic line so that all the headsets must share the same power. Because different headsets have different power requirements, one headset may draw just enough power to work but there may not be enough power left over for any of the other headsets to function. With this type of design two identical headsets will work most of the time but get different types and model

Price spread · 38 priced listings

$22
$95
$225
median CostAero · $22 SPA-400 Four Place and SPA-600 Six Place Intercoms (click to open at supplier) BAS Part Sales · $30 · core SPA-400 Sigtronics Panel Mounted Intercom (Minus Knobs) (Core) (click to open at supplier) BAS Part Sales · $40 · core SPA-400 Sigtronics Panel Mounted Intercom (12-24V) (Inop) (Core) (click to open at supplier) BAS Part Sales · $40 · core SPA-400 Sigtronics Panel Mounted Intercom w Round Face (12-24V) (Core) (click to open at supplier) BAS Part Sales · $50 · used SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate and Knobs) (12-24V) (click to open at supplier) BAS Part Sales · $65 · used SPA-400 Sigtronics Panel Mounted Intercom (Black Case and Face Plate) (12-24V) (click to open at supplier) BAS Part Sales · $65 · used SPA-400 Sigtronics Panel Mounted Intercom (Gold Case and Grey Face) (12-24V) (click to open at supplier) BAS Part Sales · $65 · used SPA-400 Sigtronics Panel Mounted Intercom (Rounded and Cut Mount) (12-24V) (click to open at supplier) BAS Part Sales · $65 · used SPA-400 Sigtronics Panel Mounted Intercom (Worn Face) (12-24V) (click to open at supplier) BAS Part Sales · $65 · used SPA-400 Sigtronics Panel Mounted Intercom Assembly (V: 12 or 24) (click to open at supplier) BAS Part Sales · $65 · core SPA-400 Sigtronics Panel Mounted Intercom Assembly Volts: 12 or 24 (Core) (click to open at supplier) Texas Air Salvage · $75 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch (click to open at supplier) BAS Part Sales · $75 · used SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate) (click to open at supplier) BAS Part Sales · $75 · used SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24) (click to open at supplier) BAS Part Sales · $75 · used SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24) (Case Dented) (click to open at supplier) BAS Part Sales · $75 · used SPA-400 Sigtronics Panel Mounted Intercom Assembly (12-24V) (click to open at supplier) BAS Part Sales · $75 · used SPA-400 Sigtronics Panel Mounted Intercom Repairable Tag (Minus Face Plate) (click to open at supplier) Aircraft Parts & Salvage · $95 · used Sigtronics SPA-400 Intercom (click to open at supplier) Aircraft Parts & Salvage · $95 · used Sigtronics SPA-400 Intercom (click to open at supplier) Texas Air Salvage · $95 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts (click to open at supplier) BAS Part Sales · $110 · used SPA-400 Sigtronics Panel Mounted Intercom (V: 12-24) (click to open at supplier) Texas Air Salvage · $115 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks (Cracked Case see details) (click to open at supplier) Texas Air Salvage · $115 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 2 (click to open at supplier) Aircraft Parts & Salvage · $125 · used Sigtronics Intercom (SPA-400) (click to open at supplier) Aircraft Parts & Salvage · $125 · used Sigtronics Intercom (SPA-400) (click to open at supplier) Aircraft Parts & Salvage · $125 · used Sigtronics SPA-400 Intercom (click to open at supplier) Texas Air Salvage · $125 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts (click to open at supplier) Texas Air Salvage · $125 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch (click to open at supplier) Texas Air Salvage · $125 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks (click to open at supplier) Texas Air Salvage · $125 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks (click to open at supplier) Texas Air Salvage · $125 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks (click to open at supplier) Safe Skies Parts · $129 · used Sigtronics SPA-400 Intercom 12/24V W/ Connector WARRANTY (0125-902) (click to open at supplier) Texas Air Salvage · $150 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts W/wiring 4 Jacks and 2 ptt switches (click to open at supplier) Texas Air Salvage · $160 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 7 jacks (See Details) (click to open at supplier) Texas Air Salvage · $195 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 8 jacks and 1 PTT Switch (click to open at supplier) Texas Air Salvage · $195 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring & 8 jacks & 1 Data Input (click to open at supplier) Texas Air Salvage · $225 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring (click to open at supplier) Texas Air Salvage · $225 · used SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 9 jacks (click to open at supplier) $22 $225

Each dot is one listing (hover for supplier & condition); color = condition.

Price by condition · median

unlisted (1) $22
core (4) $40
used (33) $115
SPA-400 Four Place and SPA-600 Six Place Intercoms CostAero
SPA-400 Four Place and SPA-600 Six Place Intercoms
SPA-400 Four Place and SPA-600 Six Place Intercoms FAA TSO approved. Pilot fail safe feature allows pilot to always hear radios. Works w…
$22.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Minus Knobs) (Core) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Minus Knobs) (Core)
Sigtronics
core
$30.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (12-24V) (Inop) (Core) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (12-24V) (Inop) (Core)
Sigtronics
core
$40.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom w Round Face (12-24V) (Core) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom w Round Face (12-24V) (Core)
Sigtronics
core
$40.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate and Knobs) (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate and Knobs) (12-24V)
Sigtronics
used
$50.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Black Case and Face Plate) (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Black Case and Face Plate) (12-24V)
Sigtronics
used
$65.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Gold Case and Grey Face) (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Gold Case and Grey Face) (12-24V)
Sigtronics
used
$65.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Rounded and Cut Mount) (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Rounded and Cut Mount) (12-24V)
Sigtronics
used
$65.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Worn Face) (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Worn Face) (12-24V)
Sigtronics
used
$65.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom Assembly (V: 12 or 24) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom Assembly (V: 12 or 24)
Sigtronics
used
$65.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom Assembly Volts: 12 or 24 (Core) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom Assembly Volts: 12 or 24 (Core)
Sigtronics
core
$65.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch
alt: SPA400
Avionics Intercoms From a: 1981 Piper PA34-200T Seneca II W/AC
used
$75.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Minus Face Plate)
Sigtronics
used
$75.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24)
Sigtronics
used
$75.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24) (Case Dented) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (Volts: 12-24) (Case Dented)
Sigtronics
used
$75.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom Assembly (12-24V) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom Assembly (12-24V)
Sigtronics
used
$75.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom Repairable Tag (Minus Face Plate) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom Repairable Tag (Minus Face Plate)
Sigtronics
used
$75.00 view at supplier ↗
Sigtronics SPA-400 Intercom Aircraft Parts & Salvage
Sigtronics SPA-400 Intercom
12/24V
used
$95.00 view at supplier ↗
Sigtronics SPA-400 Intercom Aircraft Parts & Salvage
Sigtronics SPA-400 Intercom
12/24V
used
$95.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts
alt: SPA400
Avionics Intercoms From a: 1973 Piper PA28-140
used
$95.00 view at supplier ↗
SPA-400 Sigtronics Panel Mounted Intercom (V: 12-24) BAS Part Sales
SPA-400 Sigtronics Panel Mounted Intercom (V: 12-24)
Sigtronics
used
$110.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks (Cracked Case see details) Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks (Cracked Case see details)
alt: SPA400
Avionics Intercoms From a: 1974 Cessna 150L
used
$115.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 2 Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 2
alt: SPA400
Avionics Intercoms From a: 1967 Champion 7ECA Citabria
used
$115.00 view at supplier ↗
Sigtronics Intercom (SPA-400) Aircraft Parts & Salvage
Sigtronics Intercom (SPA-400)
Removed from 1978 Beechcraft Baron E-55 S# TE1118
used
$125.00 view at supplier ↗
Sigtronics Intercom (SPA-400) Aircraft Parts & Salvage
Sigtronics Intercom (SPA-400)
Removed from 1981 Cessna 172RG S# 172RG0889
used
$125.00 view at supplier ↗
Sigtronics SPA-400 Intercom Aircraft Parts & Salvage
Sigtronics SPA-400 Intercom
used
$125.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts
alt: SPA400
Avionics Intercoms From a: 1968 Cessna 150J
used
$125.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch
alt: SPA400
Avionics Intercoms From a: 1978 Cessna 152
used
$125.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks
alt: SPA400
Avionics Intercoms From a: 1979 Cessna 172N
used
$125.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks
alt: SPA400
Avionics Intercoms From a: 1961 Piper PA24-250 Comanche
used
$125.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks
alt: SPA400
Avionics Intercoms From a: 1966 Cessna 172G
used
$125.00 view at supplier ↗
Sigtronics SPA-400 Intercom 12/24V W/ Connector  WARRANTY (0125-902) Safe Skies Parts
Sigtronics SPA-400 Intercom 12/24V W/ Connector WARRANTY (0125-902)
Sigtronics SPA-400 Intercom 12 / 24 Volt with Connector. S/N 6059694. We are unable to test this unit, however, we are selling this unit wit…
Sigtronics
used
$128.95 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/wiring 4 Jacks and 2 ptt switches Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/wiring 4 Jacks and 2 ptt switches
alt: SPA400
Avionics Intercoms From a: 1967 Mooney M20F
used
$150.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 7 jacks (See Details) Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 7 jacks (See Details)
alt: SPA400
Avionics Intercoms From a: 1981 Piper PA28RT-201 Arrow
used
$160.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 8 jacks and 1 PTT Switch Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 8 jacks and 1 PTT Switch
alt: SPA400
Avionics Intercoms From a: 1981 Cessna 172RG
used
$195.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring & 8 jacks & 1 Data Input Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring & 8 jacks & 1 Data Input
alt: SPA400
Avionics Intercoms From a: 1982 Cessna 210N
used
$195.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring
alt: SPA400
Avionics Intercoms From a: 1956 Cessna 172
used
$225.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 9 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 9 jacks
alt: SPA400
Avionics Intercoms From a: 1963 Cessna 182F
used
$225.00 view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts
alt: SPA400
Avionics Intercoms From a: 1977 Cessna 150M
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts
alt: SPA400
Avionics Intercoms From a: 1974 Piper PA28R-200 Arrow W/AC
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks
alt: SPA400
Avionics Intercoms From a: 1967 Cessna 150G
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 5 jacks
alt: SPA400
Avionics Intercoms From a: 1978 Cessna 152
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 9 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 9 jacks
alt: SPA400
Avionics Intercoms From a: 1979 Piper PA28-181 Archer
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring (See Details) Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring (See Details)
alt: SPA400
Avionics Intercoms From a: 1972 Cessna 150L
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring
alt: SPA400
Avionics Intercoms From a: 1963 Cessna 172D
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks
alt: SPA400
Avionics Intercoms From a: 1965 Cessna 172G
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts W/ Switch
alt: SPA400
Avionics Intercoms From a: 1977 Mooney M20J
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/6 Jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/6 Jacks
alt: SPA400
Avionics Intercoms From a: 1973 Cessna 150L
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring and 4 jacks
alt: SPA400
Avionics Intercoms From a: 1970 Champion 7ECA Citabria
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks
alt: SPA400
Avionics Intercoms From a: 1959 Cessna 150
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks
alt: SPA400
Avionics Intercoms From a: 1955 Cessna 180 Float
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks
alt: SPA400
Avionics Intercoms From a: 1977 Beechcraft C23
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 9 jacks
alt: SPA400
Avionics Intercoms From a: 1975 Piper PA28R-200 Arrow
used
Ask / RFQ view at supplier ↗
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks and 2 PTT Switches Texas Air Salvage
SPA-400 Sigtronics - Intercom TSO 12/24 volts w/wiring 6 jacks and 2 PTT Switches
alt: SPA400
Avionics Intercoms From a: 1969 Cessna 172K
used
Ask / RFQ view at supplier ↗

Listed under cross-referenced part numbers