Martins are basically a no none-sense, straight forward, acoustic suspension speaker. With the exception of the fact that there are better drivers available today, they never changed much over the years. Like I said I had 4 pair of these in the past. The cabinets are Rock Solid. I could never quite put my finger on it, but there was just something about they sound. The 206s I bought on eBay were well worth the 3 bills I paid. I'm using them with an old Marantz 1070 at 35 WPC. The imaging, seperation, and clarity is incredible. If anything, I think other companies copied them.