Wayne Parham Messages: 18789 Registered: January 2001
Illuminati (33rd Degree)
We use Erse Super Q (laminated steel-core) coils in the constant directivity cornerhorns - but do not use them in the matched-directivity two-ways. The woofer in the cornerhorns is only used for bass and so an iron core is fine. But the two-ways run the woofer through the midrange, and I suggest air-core coils only for them.