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This is a Rectify Series drop-in speaker system for the current-production Athearn RTR locomotives that come with dual-cube speakers. 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 uses the factory mounting screws and no modifications are needed to replace the factory speaker.


So far these have fit the SD39-2 and SD40-2 and SD40T-2 tunnel motors. As of now, I'm not sure what other locomotives Athearn is using these speakers in. If you have different RTR loco that has a similar looking speaker, it's a good bet this will fit.


You can choose to add front-mounted speakers to these in the form of the AHRR-8550-RC1 (SD38-2) or the UFIT-2115-RC1 (SD40-2).


The speaker comes fully assembled and tested.


Dimension: 15mmH x 18mmW x 43mmL

Athearn RTR Universal SD39/40-2/40T-2 (current-run)

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