mixvibes pro and U46DJ? personally i see it as a waste for pro to work with U46DJ. I would suggest echo audiofire8, edirol fa-101, NI audiodj 8, or the xxxx(i forgot how to spell it) 16/12w,
but for your question, you can see it from the firmwire version, if its 1.xxxx, then its the old one. if its 2.xxx, then its the new old. am i bullshitting? yes i am, if you dont purchase the product, how can you install it and check the firmwire. LOL,