This is a Rectify Series drop-in speaker system for Walthers Mainline GP15-1/T locomotives. The speaker uses the factory mounting and no modifications are needed to replace the factory speaker. The factory rear-LED mount may need to be trimmed.
 
The speaker comes fully assembled and tested.
 
Dimensions are: 9mmH x 18mmW x 44mmL
 
VIDEO: https://youtu.be/mlORhj_sUxc