I just bought a pair of kg4 for $50 with the 2 woofer replaced by max pentivent , they play good but not original
I had a nuts idea to pimp them as rf82 with additional passive rt12d
so i bought those parts , and will eventually sold the original passive twitters and crossover
Klipsch 1012267 RF-82 SII Crossover/ Input Cup × 2
Klipsch RF82, RF62, RB81, RB61, RS62 MKII Tweeter 1011978 × 2
Klipsch RT-12D Passive Radiator 1006668 × 2
Klipsch 1011974 RF-82 MKII Woofer × 4