Morning , I'm the person that posted on Facebook so will share details here. I installed the decoder and speaker in my TT120 class 50, connected and the locomotive was controllable, I did a firmware update but while that was happening I noticed a burning smell and discovered the the speaker was excessively hot and started to melt the sound enclosure. I've spoken with tech support and its been sent back and hopefully replaced but I am a bit concerned fitting the replacement , I'm pretty sure it's nothing that I did nothing wrong ( I watched Peachy's video of him doing it on a class 50 ) and didn't fiddle with any CV settings. I had to pry the speaker out as it had melted into the plastic.
