Many of us have done DCS upgrades to locomotives other than MTH. Many times the speaker can be an issue and the person doing the work needs to be very creative. I have several Williams NW-2 switchers that I want to do a DCS job on. Here is an MTH speaker that I would like to bring to the attention to guys/gals in the same position. The speaker is MTH part number BF-0000050. It is a 4 ohm 3 watt speaker and sounds very good. The specs are 40MM X 28MM and 11MM tall. The MSRP is $15.00. I just confirmed with MTH and these are in stock.