A nearby friend's self-built custom horn system. He previously had the JBL "K2" export-only horn system.
4-way system
Sub: Dual JBL 2235, low-pass 70 Hz/24 dB
Bass-mid: Altec 414, band-pass 70 Hz/24 dB to 500 Hz/12 dB
Mid: Three horns share band-pass xo 500 Hz/12 dB to 7 kHz/12 dB. Main: Altec 329A/288C, air & soundstage: attenuated dual Altec 1003 B/291-16B
Tweeter: JBL 2405 H, high-pass 7 kHz/12 dB. (Owner’s description omitted three tweeters atop bass enclosure; possibly JBL ring radiator super-tweeters.)
Control: TACT M2150X programmable active digital crossover, delay for driver alignment, phase reversal, balance, soft-mute, etc.
Amplification: Three TACT S2150X digital