These are Rectify Series drop-in speaker systems for current-production Atlas Master Dash 8-32/40C(W) 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.
The front-mount ALMA-QSI1 speaker mounts over the drive shaft with a touch of adhesive and no modifications are needed to install.
The rear position replaces the stock speaker with ether a UFIT-0940 or a UFIT-0950 using a strip of mounting tape or a strap of tape over the top. It basically comes down to the rear truck-wires; earlier runs have less wire length so the UFIT-0940 fits better; later runs have more wire-length and the UFIT-0950 fits easily. No modifications are needed to install.
Choose a dual-speaker install for maximum power. If choosing one speaker, I recommend the front-mount ALMA-QSI1. I do not recommend combining the stock speaker with the SSS front-mount speaker.
The speakers come fully assembled and tested.
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