There was also a woofer upgrade at some at point on the MK3. I believe there was a $200 charge. This was mentioned at the end of the last Circe review in the Absolute Sound.
I have the last version of the 5 MK3 which I have upgraded a couple of times. First all alnico magnet drivers. Then about a year ago Carl at Nola built me reference grade outboard crossovers for my Alon 5 MK3. I also went with the latest version of the midrange driver which is used in his newest speakers and the Cardas copper speakers posts he uses. Finally I recently added Carl's IP-1 isolation platforms for the crossovers. He also upgraded my reference crossovers at no charge.
Anyway the sound is light years ahead of my original 5 MK3. Alan
I have the last version of the 5 MK3 which I have upgraded a couple of times. First all alnico magnet drivers. Then about a year ago Carl at Nola built me reference grade outboard crossovers for my Alon 5 MK3. I also went with the latest version of the midrange driver which is used in his newest speakers and the Cardas copper speakers posts he uses. Finally I recently added Carl's IP-1 isolation platforms for the crossovers. He also upgraded my reference crossovers at no charge.
Anyway the sound is light years ahead of my original 5 MK3. Alan