ATC SCM40 in house tweeter & midrange

How can one tell if an ATC speaker (SCM40) has the better in house tweeter and midrange? Is there a visual way to tell, SN decode, etc?

tinear12303-09-2019 6:01pm

motokokusanagi Details Discussions Posts This discussion Message User 189 posts 03-10-2019 at 02:10am Copy Comment URL Report Comment Edit Delete The faceplate/waveguide and number of screws. 3 on the new ATC tweeter. 4 on the old Seas one. All versions use the ATC mid.