These are Rectify Series drop-in speaker systems for Life-Like Proto 1000 RS-11 locomotives.
 
Two systems are available for these locomotives:
 
The LLPR-R11R-RC1 rear-mount system drops-in and provides a slot for the factory rear headlight fitting. A PCB-style decoder can be used with this system.
 
The LLPR-R11M-RC1 mid-mount system replaces the factory PCB and offers a bigger sound over the smaller rear-mount system. The factory PCB will need to be removed with a micro-sized hardwire decoder installation in the rear.
 
The speakers come fully assembled and tested.
 
Dimensions are:
Rear-mount: 12mmH x 18mmW x 25mmL
Mid-Mount: 10mmH x 18mmW x 64mmL
 
VIDEO: https://youtu.be/8aH0pZSZjH0