This is a Coeval Series drop-in speaker system for Atlas Classic & early-run Master U30/33/36C locomotives. The speaker is a beautiful press-fit between the rear weight and motor mount. No frame/weight/shell modifications are needed! The factory PCB will need to be removed with a hardwire decoder installation.


The speaker comes fully assembled and tested. Please choose 4Ω (Loksound) or 16Ω (Soundtraxx/TCS) wiring.

CO-Atlas Classic/Master (early) U30/33/36C


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