This is a Rectify Series drop-in speaker system for pre-sound era Stewart FT 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 speaker uses double-sided mounting tape or a touch of adhesive to mount and no modifications are needed to install the speaker.
 
The speaker comes fully assembled and tested.
 
Dimensions are: 12mmH x 27mmW x 30mmL