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These are Rectify Series drop-in speaker systems for Athearn RTR SD50/60 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.


Two rear-mount versions are available:

• AHRR-SD50-RC1 for early-run, pre-sound SD50/60s

• AHRR-5060-RC1 for current-run, sound-ready SD50/60s


The AHRR-SD50 uses mounting-tape to mount and no frame modifications are required.


The AHRR-5060 uses the stock mounting-screws with no modifications required.


You can choose to install a front-mounted speaker just within the cab for better horn/bell localization. The speaker isn't visibile in the cab and this keeps the dynamic brake detail in place with the see-through grills.


The speakers come fully assembled and tested.


Dimensions are:

AHRR-SD50 - 16mmH x 18mmW x 55mmL

AHRR-5060 - 18mmH x 18mmW x 51mmL



Athearn RTR SD50/60

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