One-mm (18
AWG
3
insulated wire ts the minimum
size
recommended tor loudspeaker connections up to 15 m (50 ft)
Heavier
gauge wire
;S
recommended for greater distances
* **-mm (16 AWG) up to 30 m [100 ft) and
1
6-mm (14 AWG) up
_,0m(200
ft).
System
Adjustment
Bi-amplification ol the 4350 allows utilization ol two moderately
powered amplifiers rather than a single, large amplifier.
Since
the power density demanded
from
each amplifier is reduced in
D-amplification, each power source is
less
likely to approach its
limits of distortion, even
though
considerable volume levels are
achieved
The low frequency loudspeakers operate to 250 Hz
and require an attenuation rate of 12 dB per octave below and
above the
crossover
frequency Transition may be accomplished
with
a
JBL
5233 (single channel) or 5234 [dual channel)
Electronic
Frequency Dividing Network or
with
one ot several
electronic
crossovers
or
filtering
oevices
commercially available
The
system can be balanced subjectively using familiar
program material or, more accurately,
with
white noise,
pink noise or banos of noise.
Balance
can be determined
electronically using pink noise and adjusting the
output
voltage
levels
of the tow and high frequency amplifiers so that ihey are
equal
TO
each other, measureo at the respective
input
terminals
of the
4350.
The ultra-high frequency level control can be
adjusted subjectively or by measuring
output
using pink noise
as
source materia
1
.. If low-level crossove
r
networks are to
be utilized for the high frequency ana ultra-high frequency
transitions, complex
acoustical
testing apparatus will be required
for prooer balancing of the resultant
system
Therefore, the 4350
is
not
fitted
with
terminal connections for any configuration
other than the standard louospeaker
system
described in this
publication.
Component installation in the 4350 enclosure.left-nand configuration
"wn.
Note vertical orientation ol the ultra-high ireouency t^ansOucer
action stot.
System
and neiwork connections
viewed Irom rear ol Pe enclosure
To Next Page
Loading...
Need help?
General
