hi I'm going to install this http://www.traintekllc.com/MRC-1619-MRC-16-Bit-Drop-In-Sound-Decoder-EMD-645E/productinfo/MRC-1619/ in my dcc gp40 diesel will the Speaker fit? if not what Speaker will fit?
I am guessing that the speaker is 28mm and fits in HO scale. I have used this size speaker.
Rich