These are Rectify Series drop-in speaker systems for Life-Like Proto 1000 RS-11 locomotives. This 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 speaker comes fully assembled and tested.
Dimensions are 10mmH x 18mmW x 64mmL