This is a Rectify Series drop-in speaker system for Broadway Limited NW2/SW7 locomotives. The speaker uses the factory mounting screw and no modifications are needed to replace the factory speaker.
 
The speaker comes fully assembled and tested.
 
Dimensions are: 13mmH x 14mmW x 22mmL
 
VIDEO w/Factory Paragon2: https://youtu.be/rc5AX0bnlzg
VIDEO w/Loksound: https://youtu.be/X2FqBcABvWY