These are Rectify Series drop-in speaker systems for Athearn Genesis MP15AC locomotives. The speaker uses the factory mounting screws and no modifications are needed to replace the factory speaker. A hole between the screw-mounts is provided for both the truck and speaker wires to pass-through.
 
Two versions are available:
 
The AHGS-MP15-RC1 fits models made prior to the 2023 run. These models use a shorter, metal speaker enclosure with an oval speaker.
 
The AHGS-15X2-RC1 fits the 2023 and new models that come factory-equipped with the dual-cube speaker.
 
The speakers come fully assembled and tested.
 
Dimensions are:
 
AHGS-MP15: 8.5mmH x 18mmW x 36mmL
AHGS-15X2: 11mmH x 18mmW x 36mmL
 
Early VIDEO: https://youtu.be/72CLZGMifsY
Dual-cube VIDEO: https://youtu.be/45tmQsRKy4w