This is a Coeval Series drop-in speaker system for Athearn Genesis GP15-1/T locomotives. The speaker uses the factory mounting screws and no modifications are needed to replace the factory speaker.
The speaker comes fully assembled and tested. Please choose 4Ω (Loksound) or 16Ω (Soundtraxx) wiring.
Dimensions are: 14mmH x 18mmW x 33mmL