B-mann s4 DCC sound vs DC

[Nathan Jahreis]

Hello all, I dont want to beat a dead horse with this post, however I am still a little mixed up.  For example on the Atlas forum I have found a couple pics of the innards of the S-4.

http://forum.atlasrr.com/forum/topic.asp?TOPIC_ID=68434&whichpage=3



The first two pic's obviously have a DCC decoder and yes, I see the speaker in the front, thus DCC sound, right OR, is it the DCC ready version (DC) and the owner installed his own sound equipment?

However on my second find, the board is rather different (no wiring-harness-type decoder, and I can't figure if that black box in the front is the speaker)  The fellow who posted them described that this also was the DCC sound version.

http://forum.atlasrr.com/forum/topic.asp?TOPIC_ID=68768&whichpage=1






Can someone please help me understand.  From what I have read the sound and running characteristics are very good so I'd like to pick one up.  Also will the sound run in DC?, that is all I run.  Thanks, Nathan.