Hello,
A speaker that I greatly appreciate this home manufacturer and follows in the tradition ALTEC, I buy in the last few years 3 pairs, the closer exchange some details.

The 2006 models:
-gray frame
-0.25 inch spade type terminals
-decompression from the front
http://3.bp.blogspot.com/-ny3_3iYABC...006%2Bface.JPG
http://2.bp.blogspot.com/-Z3sqmhBtim...2006%2Bdos.JPG

Models 2010:
-black chassis
-a piston terminal
-decompression from the front
http://3.bp.blogspot.com/-D43jYDhE45...010%2Bface.JPG
http://3.bp.blogspot.com/-ET04Hq8kLC...2010%2Bdos.JPG

Models 2011:
-black chassis
-a piston terminal
-decompression from the back
http://4.bp.blogspot.com/-8uy0XQAlRF...011%2Bface.JPG
http://4.bp.blogspot.com/-6x89rtRJJY...2011%2Bdos.JPG

Surely the vagaries of mass production or some form of standardization in relation to other models from this manufacturer.

St?phane