Norfolk & Western J #611 sound upgrade

[bobv]

I have a very nice running Bachmann Spectrum Norfolk & Western J class #611 with DCC on board
Question: If I wanted to add sound- how complicated is it to add?  I see a spot in the tender with holes for the speaker.
Do I have to replace the current circuit board or is it just a plug in a component?
Thanks

[ABC]

You can actually remove the current decoder and replace it with a DCC & sound decoder with the 8-pin plug, so all you would have to due is plug it into the 8-pin socket correctly (there will be a number indicating which way is which). A descent DCC & sound decoder with speaker starts at around $70 and the prices go up from there.  As a general rule the bigger the speaker the better (as long as it fits).

[bobv]

Thanks
Appreciate the help.
Anybody with experience out there who has done this?  What decoders work? (model #'s)?

[ABC]

Tsunami decoders are a good choice, it is just a matter of preference and how much you want to spend.