DriveCore Technology: The JBL CS series utilizes DriveCore
technology developed by Crown, another Harman brand. DriveCore technology
integrates the amplifier drive stage into the power output stage, and fuses
everything into a chip the size of a dime. This significantly reduces the size
and weight of the amplifier. The CSA140Z is rated at 40 watts x 1 channel (into
4- or 8-ohms) @ 1kHz with less than .5% THD.
Harman GreenEdge: The JBL Commercial amplifier is
manufactured under Harman's GreenEdge environmental initiative, utilizing
recycled copper, aluminum and steel, an energy-saving powder coat finishing
process, and conforming to lead-free RoHS standards and other
environmentally-conscious manufacturing processes. The result is an 80%
improvement in efficiency over previous models. In addition, the CS series
amplifier is EnergyStar certified.
Controls: The JBL CSA140Z commercial series amplifier offers
front and rear panel controls.
- Volume Control: A rotary volume knob lets you control
the output of the amplifier. The illuminated ring surrounding the volume
control will light green with the presence of a signal. If the signal
reaches the threshold of clipping or audible distortion, the ring will glow
- Bass & Treble: The JBL CS series amplifier offers
independent Bass (+/-10dB @ 100kHz) & Treble (+/-10dB @ 10kHz) adjustment. A
small flat-blade screwdriver is needed to adjust bass & treble.
- HI-Z Switch: When this rear-panel switch is in the "Off" position, the
amplifier is configured to drive low impedance speakers (4-Ohm minimum). With
the Hi-Z switch set to "On", the built-in output transformer is activated
allowing the unit to drive 70V or 100V speaker systems directly when connected
to the appropriate output terminals.
- High Pass Filter: As an added feature when driving high
impedance speakers in HI-Z mode, the system automatically switches in a 70Hz
high pass filter. The filter prevents potentially damaging subsonic signals from
going to the amplifier by eliminating signals below 70Hz.
Unbalanced & Balanced Inputs: The JBL CSA140Z commercial
series amplifier is equipped with a stereo RCA unbalanced input which will
stereo sources. The amplifier is also equipped with a 3-pin Euro-block connector
that can be used as a balanced or unbalanced input.
Note: Do not use both Euro-block and RCA audio input connectors on a
single channel at the same time.
Low Impedance or Constant-Voltage System Output: The CSA140Z
is designed to power low impedance or constant-voltage speaker systems. There is
a 5-pin Euro-block connector for a variety of output configurations. To drive
distributed speaker systems designed to operate at 70V or 100V, the 5-pin
Euro-block connectors have designated terminals for 70V, 100V and Common. For
8-ohm speakers, the + and - terminals should be used.
Note: The minimum impedance the amplifier channel can drive is 4-ohms.
Therefore, you can connect up to four 16-ohm speakers, two 8-ohm speakers or one
4-ohm speaker to an amplifier output channel.
Remote Volume Control: An RJ-45 port is provided on the back
panel for plugging in a
remote volume controller via Ethernet cable.
Rack Mountable: The JBL CSA140Z commercial series amplifier is
rack-mountable in a 1U half-rack space, and includes a rack-mount kit. Hardware
is also supplied to mount two CSA140Z amplifiers in a 1U rack space.
Note: When using an equipment rack, keep a minimum space of 4"
from the top surface of the unit. Close any open spaces in the rack with
blank panels. Do not block any air vents. The side walls of the rack should
be a minimum of 2" from the amplifier sides. The back of the rack should be
Sleep Mode: To save energy, the amplifier is designed to go into sleep
mode after approximately 2 hours operating with no signal at any of the inputs.
Return of signal (-36dBu) to any input will wake the amplifier from its sleep
mode. The sleep mode can be disabled by activating the Sleep Disable switch on
the rear panel.
Detachable AC Power Cord: The JBL CSA140Z includes a detachable 34" AC
power cord (IEC 3-prong).
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