Grateful Dead Cornell 5/8/77 on FrankenAltecs
604E woofer sections (1st order rolloff ca. 700 Hz) in Billfort vented cabinets
JBL 2441 2" compression drivers on EMILAR EH500-2 horns (1st order ca. 700 Hz and padded)
B&C DE35 as 'supertweeters' (1st order ca. 20 kHz and padded)