Ok then what you need is an LGB Sound Box DCC fits in simple. This is just one UK supplier but sure you may be able to get one a little cheeper, try Tops Slots near Blackpool.I’m DCC already with the standard simple LGB small loco Plug in module. I was wondering if a sound module existed that would sit alongside the existing one to save me ripping out everything, but if needs must then I’ve converted a a Brunig 1051 so I’m ok with it.
When I put a Massoth XLS decoder in my Zugspitz I couldn’t see an obvious place for the speaker. Regrettably, I still haven’t been able to install the speaker but my initial thinking was to mount it against the loco side and drill some holes to let the sound out. The holes would be disguised by a grid of some kind. Not prototypical but that wouldn’t bother me.
Be interested to see how you decide to put the speaker in.
I meant the small loco decoderThat is a little crude!
A Massoth S will just require the address setting the same, and track-power.. - You can add an external volume pot. if you wish?
I am not familiar with the PLUG decoder.. If it has a SUSI connector, you can do away with the track power connections, as well.
Since I have two of the Racks I took them both apart to see which one suited the LGB unit best (I started with that one since it's from the same era as the loco!)
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A small block of wood on top of the original PCBA lifts it above the connectors and it sits quite nicely in the centre of the model.
The sound comes out of the loco fine without the need for additional holes. Only drawback is I have to remove the lid to adjust the volume, but a little trial and error before fitting the screws has done the trick!