AirChime K5LLA


The picture illustrates a common arrangement of the horn bells, with the 1L bell reversed. In this configuration, the horn would be designated a K5LLAR1L. The first "L" indicates the use of a low-profile manifold, the second "L" indicates the use of the low pitched 1L bell replacing the 5 bell of the standard K5LA.


As with the K5HL, the K5LLA began appearing on US railroads in 2004, apparently in response to a change in the US Code of Federal Regulations (49CFR229.129) that specified a maximum as well as a minimum decibel requirement.


Intended tuning is: C,D#,F#,G#,B (261, 311, 370, 415, 494 Hz)

The horn uses the K-series #1L, 1, 2, 3A, and 4A bells.


K5LLA horns began appearing on new EMD locomotives in late 2004.


Early K5LLA sound samples:

UP SD70ACe:
Sample 1...74kB...4 seconds
Sample 2...668kB...43 seconds
Sample 3...457kB...29 seconds
Sample 4...362kB...23 seconds
Sample 5...390kB...24 seconds
Sample 6...285kB...18 seconds
Sample 7...241kB...15 seconds
Sample 8...289kB...18 seconds
Sample 9...444kB...11 seconds

Courtesy Tom Hallendorf
Sample 10...167kB...10 seconds
Sample 11...407kB...26 seconds




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