The Murphy Models class 141/181 have a very narrow body chassis due to their unique shape. They are also not fitted with speakers out of the box.

Given the minimal space available, some modification of the body shell and chassis is needed to fit any decent size speaker into the loco.

After a lot of testing, this video will show you how to modify and file the body chassis without damage, wire and fit the speakers in parallel and connect the LokSound DCC v5 sound chip for an awesome sounding model locomotive!