Roland TR 909 Comparison between original and revised editions. 

Very good to see this because I've owned 2 909's and its obvious to me now I had a revision 2 which I preferred.

revised edition what is that?

Hi there, could you do it again in stereo please ?

Let's do a 130 BPM battle Kick Drum

The serial number of mine starts with 404. That means, only the kick was changed ? Looks like a good revision then !

I miss the open high hat ?