This is a Rectify Series drop-in speaker system for Athearn Genesis GP7/9 locomotives. The speaker uses the factory mounting screws and no modifications are needed to replace the factory speaker. It has been slightly increased in size for an even bigger, beefier sound. Note the first photo shows the original model, while the second photos shows a Genesis GP15 installation. These speakers fit both Genesis GP7/9 and GP15 locomotives.
The speaker comes fully assembled and tested.
Dimensions are: 14mmH x 18mmW x 33mmL