Josh:
The new 3.7s use as you stated the aluminum ribbon foil in the tweeter, but the quasi-ribbon is used only in the midrange. The bass panel still uses the planar magnetic driver.
The 20.1 has a simillar configuration, except both the bass and midrange sections are push-pull.
The new 3.7s use as you stated the aluminum ribbon foil in the tweeter, but the quasi-ribbon is used only in the midrange. The bass panel still uses the planar magnetic driver.
The 20.1 has a simillar configuration, except both the bass and midrange sections are push-pull.