An improved 3.7 may come as a surprise given that the 3.6 had a 12-year run. But, this is unusual in other ways.
The changes did not require retooling or significant cost increases. It did not warrant waiting for a major product change as a 3.8. So, we decided to pass it on now.
Yes, it is unusual, and it is the first time in Magnepan’s history that a speaker can be upgraded at the factory at a reasonable cost (details to follow).
Source: Press Release