merlin used or new

the gen 3 cannot be upgraded to a vsm mm because the cabinet construction, enclosure material, port alignment, internal damping products and adhesives are all different. there is a substantial difference in the potential sound of the mm and gen 3 cabinet. your plan of upgrading a gen 3 is not recommended.
only certain late ses and the millennium may be upgraded to the mm and before you purchase anything used, call the factory and ask for me with the serial number and i will tell you what you are looking at.
regards,
bobby@merlin
585 367 2390

There you go,from the man himself.Save up for the VSM-MM,if at all possible.I did,and they are spectacular.Good luck,you can do it...Bob

Bobby will NOT steer you wrong. Give him a call.

Be careful, bobby's such a great guy you may end up buying a new pair from him...lol. I know I sure did and have never looked back!

Jason

Had my late model SE upgraded to VSM-M. Then upgraded that to the VSM-MM. As above, you can't go wrong with Bobby's recommendations.

David