JBL 4671 Instruction Manual page 12

FIGURE 6C. 0N-AX1S RESPONSE OF 4676B-1 (2ir LOADING);
HIGH-FREQUENCY POWER RESPONSE CORRECTION ADDED.
LF
Reflex Loading
The LF sections of these systems are four ohms in
impedance, and that consideration should, as in the pre-
vious section, dictate the choice of wire gauge for hook-
up.
It is important in any biamplified installation to
include DC blocking capacitors in output of the high-fre-
quency amplifier, as shown in Figure 7C. The capacitor
protects the high-frequency driver from any inadvertent
DC or low-frequency transients which could develop dur-
ing power-up or power-down phases of amplifier opera-
tion. Figure 7D presents a table of capacitor sizes for
various applications.
12
LF
Horn Loading
Frequency in Hz
FIGURE 7. WIRING DIAGRAMS FOR
LARGER SYSTEMS
FIGURE 7 A .
For 4675 and
4676 B-1 (See note in
text concerning
polarity)
3160