There is a used Trace Elliot cab at Guitar Center, I'm going to get it eventually, it's been there for about a year. It's a 1X15 with the green carpet covering. This one doesn't have those two red lines under the speaker/behind the ports that I have seen some cabs. Is there a difference between this cab and the ones with the red lines? Also how do the new cabs differ from the older ones. This 15 is the best cab I have ever heard. I played a Marcus Miller 4 through an SVT4-Pro out of the cab this morning and fell in love with it. I'm going to get the 15 and eventually get a 4X10 so my question to you is what is the difference between the cabs with the red lines, the ones without the red lines, and the newer ones?