Specifications
15
XC-3 2-way Crossover
The XC-3 is an active, 2-way
crossover module that mounts to
the rear panel DataPort of
2-channel QSC amps (DCA,
PL2, PL3, CX, ISA).
The XC-3 features 4th order Linkwitz-Riley filters (24
dB/octave) with the low frequencies routed to amp
channel 1 and the highs to channel 2. Each channel
has an all-pass filter delay for time alignment of low-
and high-frequency drivers, and a trim control (0-20
dB attenuation) to balance the frequency bands. The
high-frequency channel offers up to 10 dB of boost at
20 kHz to properly equalize constant-directivity horns.
A 3-way crossover can be implemented using the
XC-3’s low-frequency high-pass filter with the LF-3.
SF-3 Subwoofer Filter
The SF-3 subwoofer filter
provides subwoofer signal
processing without the need for
a conventional crossover. The
unit mounts to the rear panel
DataPort of 2-channel QSC amps
(DCA, PL2, PL3, CX, ISA) to conserve cost and rack
space. A 4th order Linkwitz-Riley low-pass filter may be
set to 80, 150 or 250 Hz. The subsonic filter offers
roll-off frequencies in the range 20-50 Hz to prevent
driver overexcursion. An optional EQ is provided to
extend the response of B6 speaker enclosures. A trim
control (0-20 dB of attenuation) allows balancing the
various frequency bands.
LF-3 Low-Frequency Filter
The LF-3 low-frequency filter,
when used with the XC-3
2-way crossover, provides a
3-way active crossover system.
The LF-3 mounts to the rear
panel of 2-channel QSC amps
(DCA, PL2, PL3, CX, ISA) to conserve cost and rack
space. The LF-3 is comprised of two discrete channels
with 4th order Linkwitz-Riley low-pass filters (24 dB/
octave slope). Each channel has a delay to time-align
low-, mid-, and high-frequency speakers, and a trim
control (0-20 dB of attenuation) to match levels. One
amp-mounted LF-3 supports up to two other amps
(even in stereo) with XC-3 accessories installed.
OT-300a Output Autoformer
The OT-300a is a robust step-up autoformer accessory
that adapts power amplifier outputs (maximum voltage
range 17-35 volts) to drive a 70 volt distributed line with
up to 300 watts. Four voltage taps can be selected to
match the output voltage of your amplifier. Conversely,
the OT-300a can be used as a high-power speaker
transformer, driving speakers with up to 300 watts from
a 70 volt distributed line. The OT-300a is compatible
with any amplifier rated at up to 350 watts at 4Ω.
OT-600 Output Autoformer
The OT-600 is a robust step-up autoformer accessory
that adapts power amplifier outputs (maximum
voltage range 40-50 volts) to drive a 70 volt distributed
line with up to 600 watts. Three voltage taps can be
selected to match the output voltage of your amp. The
OT-600 can also drive a 100 volt line when used with
an amp with a maximum output voltage in the range
55-70 volts. Conversely, the OT-600 can be used as a
high-power speaker transformer, driving speakers with
up to 600 watts from a 70 volt distributed line. The
OT-600 is compatible with amps rated between 350
and 650 watts at 4Ω.
IT-42 Output Isolation Transformer
The IT-42 is an output isolation transformer accessory
for the QSC CX302 amplifier, allowing it to drive two
25, 70 and 100 volt distributed lines in stereo or
parallel or a single 140 or 200 volt line in bridged
mono. The IT-42 is pre wired for quick and convenient
mounting to the back of the CX302 amplifier and
requires no additional rack space.
All the accessories listed are RoHS compliant.
DataPort
The QSC DataPort provides a simple, convenient means of
connecting and powering digital and analog accessory devices
to expand the capabilities of QSC CX, DCA, PowerLight™,
PowerLight 2 and PowerLight 3 amplifiers. Devices supported
include the DSP-3, DSP-4, XC-3, LF-3 and SF-3. Note that ISA
models require an external power adapter for the DSP devices,
and PL380 for the DSP-3 device.
In addition, the DataPort HD15 connector provides a single-
cable interface to Q-Sys™ and QSControl.net™. Q-Sys and
QSControl.net allow remote amplifier monitoring and control.
This functionality is supported by CX, DCA, PowerLight,
PowerLight 2 and PowerLight 3 amplifiers.
Please see the specifications for the specific accessory devices
and amplifiers before planning a system.
RoHS
AMPLIFIER ACCESSORIES