zalytron sells the drivers the c223 is an upgrade from the c212 that are in the eidelons these are also carefully matched at the factory so the box says
incredible
i own a pair of avalon eclipse the more upgrades of equipment the less satisfied i became with the upper treble after some research i found that the eidelons use accuton ceramic mid and tweeter so i took the 440 $ plunge i bought the c223 the sound quality is incredible smooth accurate detailed awesome soundstage im waiting for a full break in i am now considering the 7 in. ceramic woofer take a chance the 500 i spent was almost like spending 5000 or more my friend has symphonic hearing after listening for 5 minuites out of the box no break in he now wants a pair to mod his vandersteen 2c sigs im also considering a crossover mod happy listening