This is a Coeval 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. Note the first photo shows the original Rectify model, while the second photos shows both Rectify and Coeval in a Genesis GP15 installation. These speakers fit both Genesis GP7/9 and GP15 locomotives.
The speaker comes fully assembled and tested. Please choose 4Ω (Loksound) or 16Ω (Soundtraxx) wiring.
Dimensions are: 14mmH x 18mmW x 33mmL