The key features of D2010/8513 tweeter are: front flange with diffraction damping foam, dual rear chamber and ferrite magnet system.
Scan-Speak D2010/851100 - information in PDF format (438 Kb)
Review in Hobby HiFi #3-2001 Magazine (in German, 781 kБ)
Diffraction damping pad for D2010 Classic tweeters.
Air-core OFC foil coil.
High-purity copper coil wound around a Permite core.
High-purity copper coil wound around a Permite core (with discs).
Air Core Coil.