JBL 5235 Amplifier
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Model:
5235
Date:
1987
Category:
Group:
Description:
Frequency Dividing Network
Information
General Applications
When used for two-channel bi-amplification, each channel
INPUT of the 5235 receives the full-range program signal
from a line level source such as a preamplifier, mixing
console or graphic Equalizer. Identical frequency selection
modules are installed in both channels, and the dividing
network, separates each of the two channel's signals into
high and low frequency bands. Each channel’s LOW and HIGH
outputs then feed individual power amplifiers (or discrete
Amplifier channels), which in turn drive their respective
loudspeaker components.
The 5235 also may be used as a dividing network for a single
channel of triamplification. In this application, Channel 1
of the 5235 receives the full-range program signal, and
separates it into two bands, one consisting of low and mid
frequencies, the other of high frequencies only. The Channel
1 HIGH output then feeds the Amplifier which drives the high
frequency driver, while the Channel 1 LOW output (carrying
low and mid frequencies) is connected to the 5235's Channel
2 INPUT. The Channel 2 Crossover point is chosen to fall in
the region where the low frequency loudspeaker's operating
range ends and the midrange driver's operating range begins.
Therefore, Channel 2's LOW output is suitable for feeding
the amplifer which drives the low frequency loudspeaker,
while its HIGH output is suitable for feeding the Amplifier
which drives the midrange driver. In this way, the CHANNEL 2
HIGH FREQUENCY LEVEL control becomes a midrange driver level
control and is independent of the CHANNEL 1 HIGH FREQUENCY
LEVEL control, which affects only the high frequency driver.
As an option, the 5235 can be fitted with "blank" frequency
dividing modules that have Jumper resistors installed in
such a way that the input signal is split and fed to each
channel's HIGH and LOW outputs. As such the 5235 operates as
a fully buffered dual distribution Amplifier. While this is
not the primary purpose of the unit, the capability can be
useful when it is necessary to split a signal and drive
separate lines and prevent any short or noise source on one
line from causing problems on the other.
Manual type:
Service and User Manual
Pages:
36
Size:
4.30 Mbytes (4513949 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1987 01 01
Quality:
Scanned document, all readable.
Upload date:
2017 09 24
MD5:
dc8dfbfa926cc5b15bf9c03fd238bf22
Downloads:
602
Information
SECTION I Introduction Ease
Preface 1-1
Unpacking and Inspection 1-1
SECTION 2 Installation
Installation of Standard Crossover Frequency
Modules 2-1
Programming the Internal High Pass Filters 2-2
Signal Connections 2-5
Barrier Strip 2-5
XL Connectors 2-5
Input Connections 2-6
Output Connections 2-7
Using Floating or Balanced Cables for Longer Runs 2-7
Impedance and Termination for 600 Ohm Lines 2-8
AC Power Connection and Line Voltage Conversion 2-9
Grounding 2-10
Mounting 2-10
Security Cover 2-11
SECTION 3 Sg.lup..,flnd. Operation
General Applications 3-1
Typical Systems Employing the 5235 3-2
Protection of Compression Drivers 3-2 A Safety Procedure for
Initial Powering Up of
the System 3-5
Level Control Adjustment 3-5
Subjective Adjustment of Biamplified Systems 3-6 Subjective
Adjustment of TriAmplified Systems 3-6
System Phasing and Signal Polarity 3-7
Objective Method of Polarity Determination 3-8
Subjective Method of Polarity Determination 3-9 Selecting
the Low Frequency
High-Pass Filter Options 3-10
Suggestions for JBL Professional Series Products 3-11
Blank Crossover Card Assembly 3-12
SECTION 4 Maintenance
Repairs and Warranty 4-1
Schematic
