This is a Rectify Series drop-in speaker system for Atlas Master (late) U23/30/33/36/B & B23/30-7 locomotives. Atlas uses the same enclosure in most of their late-run Master locomotives, so this will fit many other models as well! 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 mounts with a touch of adhesive and no modifications are needed to replace the factory speaker.
The speaker comes fully assembled and tested.
Dimensions are: 11mmH x 17mmW x 40mmL