This is a drop-in speaker system for Athearn Genesis SDP40F/SDF40-2 locomotives. More than just a box, the enclosure features Diapasonic Tuning™, which allows the lower frequencies to accurately develop and resonate, clears the midrange of excess resonance and tunes the upper-mid/high response. The speaker drops right-in and no modifications are needed to replace the factory speaker.


Choose either the short, the tall or both systems installed in the rear/front speaker cavities.


The speaker comes fully assembled and tested.


Dimensions are:

28mmDia x 13mmH (short)

28mmDia x 17mmH (tall)



Athearn Genesis SDP40F/SDF40-2