254 mm
10 in
184 rr.m
VA m
HL91, HL92 And HL93 Mounting Dimensions
Frequency Dividing Networks
JBL dividing networks provide imperceptible distribution of the audio signal
among the transducers of the loudspeaker system. All JBL networks are
engineered to match the exact characteristics of specific components,
including the horn/lens assembly, as shown in the Network Selection
Chart. We do not recommend using JBL loudspeaker system components
in other combinations or with those of other manufacturers.
Adjustment
Each JBL dividing network is provided with a level control
that permits matching loudspeaker system performance to the acoustic
characteristics of the listening room and to listener preference. The control
regulates Ihe amount of power fed to the high frequency transducer. It
does not affect the crossover frequency, nor does it limit the upper
frequency response of the loudspeaker system.
Adjustment of the level control should be made on the basis of evaluation
of normal program material played monaurally with amplifier tone controls
at the middle, generally referred to as "flat!' position. Once the loudspeaker
system has been balanced for best overall results, compensation for
additional differences in program material should be made with the tone
controls on the preamplifier or receiver.
Genera'—General application networks have either a continuously variable
or three position control. With the control in the mid position, evaluate the
relative loudness of high frequency program material and raise or lower
the control setting to obtain the most realistic musical balance. When two
dividing networks are required, such as an N8000 used in conjunction with
an LX13. first set the high frequency network control at its minimum
position (so the ear will perceive only the balance between the low
frequency and midrange components), secondly, adjust the low frequency
network for the most pleasing balance, and finally, adjust the high frequency
network for the most pleasing treble performance.
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