David - Yes, unfortunately, Massoth Germany isn't very speedy in responding to technical questions or handling warranty claims. I sent the Navigator transmitters and two Massoth Pulsed Smokers to them for repair/replacement about a month ago so I don't expect to get the replacements for some time. Luckily I have a Massoth dealer in Germany that I buy my products from and he passes on my technical questions and complaints to Massoth directly..........Massoth is more responsive to him and speaks their lingo! My biggest complaint about the Massoth DCC Sound decoders is the lack of quality sound of the "chuff" in their American steamer sound files........it distorts around 3 - 5 speed step range on my Navigator depending upon what setting are made for CV197 and CV198. Actually their older 2010 version of the XLS sound files is superior to the current sound file. I found this out when a customer furnished his own 2010 Version of an XLS DCC Sound Decoder with the American Mogul sound file on it.......he had bought it many years ago while visiting Germany and finally decided to get me to install it for him. I have a video of it operating on my YouTube Videos Channel and I sent the link to Massoth Germany for comparison with their current sound file. Hopefully their new XLSC DCC Sound Decoder, to be available by the end of the year, will be a major improvement. My YouTube Videos Channel Link:
Old Dominion Railways - LGB Trains