This is a Rectify Series drop-in speaker system for Atlas Master S2/S4 locomotives. The speaker uses the factory mounting screws and no modifications are needed!
 
Two versions are available; one speaker for the PCB that uses bare wires and clips and a speaker that works with the PCBs using 2-pin connectors for the wiring. The two are not compatible so please check which version PCB you have. The speakers do not come with wires or a harness.
 
The speaker comes fully assembled and tested.
 
Dimensions are 9mmH x 17mmW x 32mm