The Federal Signal Litestak® Sound Module is a microprocessor-based audible signaling device. Model LSS can be combined with the Federal Signal Litestak light modules to create an audible/visual signal.

The sound module contains a microprocessor-based tone generator and an integrated speaker which produces one of 18 tones. Select tones by setting five, 2-position DIP-switches. The sound module can work as a stand-alone audible signal when plugged into the Model LSBS Low Profile Surface Mount Base or Model LSB Pipe Mount Base. 

The Model LSS can be combined with any Litestak light module configuration of up to four colors. Controlling the sound module is done via the wires normally used for the clear light module. The sound module always occupies the top module position in a Litestak tower. All Litestak models should be mounted base down. 

Ideal applications for the LSS include environments where the ambient noise is not extreme: assembly lines, conveyor systems, automated lines, instrument panels and workshops.


Voltage 24VDC
Operating Current 180 mA at 24VDC
70 mA at 120VAC
Decibel Output Refer to Chart
Tone Output - Balanced Signal Line Refer to Chart
Operating Temperature Minimum 32 °F
Operating Temperature Maximum 120 °F
Enclosure Rating Type 1
Net Weight
24VDC 0.60 lb
120VAC 0.90 lb
Shipping Weight
24VDC 0.80 lb
120VAC 1.10 lb
Height 3.250 in
Diameter 3.930 in


Product Literature
Product Manuals

Ordering Information

Model Types
Model Description UPC
LSS-024 Litestak sound module, 24VDC 782979268314
LSS-120 Litestak sound module, 120VAC 782979268321