FA42T-6MB 4" Coaxial Loudspeaker with 70.7V/100V-16W Transformer by Atlas Sound is the entire 4" speaker/ transformer/ selector switch/ front plate assembly found in the FAP42T assembly.
The footprint of the FA42T-6MB is identical to a standard FA series 6" speaker component. This footprint allows the motor board to fit into all original Strategy Series 6" enclosures in the exact same manner as a regular 6" FA speaker (FA136Txx). It has an enhanced quality 70.7V/100V internal transformers minimize insertion loss and maintain low frequency response while providing increased output for higher SPL applications