The woofers mounted on the front, driven by the amplifier, generate a signal via a second voice coil, which should control the passive woofers mounted on the rear and coupled via a common volume.
Lowest tone: 2x 180 mm (manufacturer Peerless , catalog number 831894)
Low tone: 2x 180 mm (manufacturer Vifa, type PL18WO15-09 with double voice coil)
Low midrange: 1x 170 mm (manufacturer 814606bfdec1050121d78a4a8458dbaa, type HM 170 Z 12)
High frequency: 1x 28 mm (special development of the company LG P from Ulm)
String Suspension Concept. Specially designed tweeter. The three turnouts and the tweeter are attached decoupled to tensioned bands.
inductive coupling
System 80T-SCC
System 150T-SCC
System 200T-SCC
System 300T-SCC
System 500TW-SCC
System Center T-SCC
Lowest note: Original chassis still available in small quantities (as of March 2011): http://www.hoejttalerbutikken.dk/product.asp?product=429
Woofer: Original chassis still available in small quantities (as of March 2011): http://www.hoejttalerbutikken.dk/product.asp?product=801
Low midrange: According to information from http://www.audax-speaker.de (R. Krönke), type HM 170 Z 0 (newer designation HM 170 MN 0) is virtually identical. No changes to the crossover necessary.
Tweeter: replacement recommendation from M. Diestertich (2009): Manufacturer Scan Speak , type D2904/980000. No changes to the crossover necessary.