I am not sure if you were referring to my post, wassup, but yes, I was referring to the AD-600A, not the AD-660.
I had a few AD-660's, but I did not like the specific method one has to go through to burn mp3's that the unit will recognize (ISO9660/Mode1/8.6 Character File Names). Also, the ones I owned did not like CDRW's at all. My AD-600A will play basically any mp3 I stick in it.
The third (yep, I went through 3 of 'em) AD-660 I owned did have that feature sticker along the side (hurry....take it off! The first one I had also had the sticker, so I pulled it off immediately. The third one I left the sticker on for a few days...after I took it off, it left a huge glue mark all along the top and side. Nothing I could do would get rid of it. It was ugly). It also had the warranty label. I was not aware of any differences in the plugs on the back though.
You can tell if you have the "newest" AD-660 by hitting the following buttons on your remote:
1. Setup
2. Step
3. Track Backward
4. Track Forward
It should take you to a version page that I believe will say 660-8MM. This page does nothing else, as it is not a "loophole page."
Oh yes, the other thing that annoyed me about the AD-660 is the Subtitles always came on automatically. I had to turn them off everytime I put a new disc in. Blech.