This is a drop-in speaker for current, 2025+ release Scale Trains ES44 locomotives that use the redesigned 4-screw speaker located under the rear radiator weight, on top of the main weight. This speaker replaces the entire gray radiator weight and screws in-place with the factory screws. No modifications are required. This speaker features Diapasonic Tuning™ and provides a deeper, clearer, smoother sound with more detail over the stock speakers.
 
This speaker does not fit earlier runs where the stock speaker is sandwiched between the two, large, weight-halves.
 
The speaker comes fully assembled and tested.
 
An install guide will be available soon.