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This is a Rectify Series drop-in speaker system for most current-run Atlas Master locomotives, such as the U23/30/33/36/B, B23/30-7 and others using the "standard" 16x35 Atlas enclosure. 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.


This speaker is available in two versions and the "deck-mount" should be used in 90% of applications even though the stock speaker uses screws;


ALMA-UNI1-RC1 is "deck-mount" and should be used if your locomotive's speaker is mounted to a "shelf" on the frame as most of them are. The speaker mounts with double-sided mounting tape or a strap of tape over the top.


ALMA-UNI2-RC1 is "screw-mount" and should only be used if your locomotive's speaker "floats" in the air over a truck. The speaker mounts with factory screws. Do not use this version if your speaker is a "deck-mount". This speaker does work with the RS3 but does not work in the RS-1, which requires notches for the number boards. Use ALMA-RS1L-RC1 for these.


While these speakers are based on the typical Atlas 16x35 factory speaker, smaller Atlas switchers utilize different speakers. I offer these as well, such as the S1-S4, HH600/660, MP15 and others, in addition to various early-run pre-sound and QSI-era Master locomotives.


The speaker comes fully assembled and tested.


Dimensions are: 11mmH x 17mmW x 40mmL



Atlas Master Universal (U23/30/33/36B, B23/30-7, RS3, others)

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