This is a Rectify Series drop-in speaker system for Rapido F59PH locomotives. Simply remove the two stock speakers and the SSS speaker snaps into the rear bracket. This places the driver right where the sound should emit - below the horn and exhaust. No modifications are needed to replace the factory speaker. Room is left in front of the speaker to add an ESU PowerPack Mini or TCS KA2 KeepAlive® if desired.
 
The speaker comes fully assembled and tested.
 
Dimensions are 8mmH x 26mmW x 93mmL
 
VIDEO: https://youtu.be/CzJKC0XUsPM