JBL 4671 Instruction Manual page 6

FIGURE 3, Cont'd
HORN/DRIVER
SCREWED IN PLACE
C. 4 WOOD SCREWS*
INTO FRONT EDGES
PANEL REMOVED
O F LF ENCLOSURE
B.
"Use # 1 0 x 2 flat-head Philips wood screw; pre-drill holes with Va" bit.
D. MOUNTING LF TRANSDUCERS IN 4507, 4508,
E. MOUNTING LF TRANSDUCERS IN 4550BKA
AND 4518
AND 4560BKA
6