The "Mermans" that I designed and built for under $1,500/pr with used drivers including JBL 2241H 18", JBL 2251J 9.5" and modified Great Heil.
They can play from a whisper to symphony/concert levels in a 5,000 cu ft room without compression/distortion.
Never have I heard a speaker with this level of detail and soundstage/imaging, and I wish that everyone could experience it. The system (add an Oppo95 and Yamaha RX-Z9) was compared favorably against a $100,000+ system. I find "Easter Eggs" like you can’t believe in just about every cut I listen to. THAT’S WHERE THE REAL FUN IS! Unfortunately, YouTube does not convey these attributes.