Periodically, I check out the used amps sections at Guitar Center's website and occasionally I find some very interesting things. This happened to me the other day. The picture displayed with the cabinet was a blurry mess and I could hardly see anything but I was able to make out the little orange square and aluminum dust covers that indicate JBL speakers. It turns out, the GC in Concord, CA had a used Crate BE-215L speaker cabinet. When I saw the price listed my jaw almost hit the floor : $150. I had wanted to have another cabinet with JBL drivers for a long time and this looked like a great opportunity. I live many miles away from Concord so I figured it would be cheaper to have it shipped than it would be to drive there and back. Since they have a thirty day return policy I figured, what the heck? so I ordered it up. When it arrived I extracted it from its packing box and had a look. It wasn't in too bad a shape but it had obviously seen better days. Then, to satisfy my curiousity, I took off the front grill and removed a speaker to see what kind they are. It turns out they are M151-8. This was one I had never heard of so I was a bit disappointed. I did a little reading on-line and found that all was not lost. I put the speaker back in and the grill back on and plugged my amp into it to see what it sounds like. I would summarize my thoughts by stating I am reasonably pleased with this cabinet. While it's not exactly what I was hoping for, It sounds really good and I like it a lot. I was hoping for a couple of E or K series 140s but these speakers aren't too shabby at all. I think this was a very good deal. I need to try it at a rehearsal with my band to find out how it really sounds. This band rehearses louder than any other band I have been in played live so this will be a very good test. I attached a shot of the cabinet. I like the look of those aluminum dust covers. I also attached a shot with some entries from JBL's document of Thiele-Small parameters so you can see how the M151-8 compares with some of JBL's other 15-inch woofers. I think they compare favorably. The primary differences between the M151-8 and the E and K series speakers was the M series had aluminum voice coils and they handled a bit more power while being lighter. The good thing is I still have three more weeks to make sure I like it enough to keep it.