IS 123 LOUDSPEAKER
12” THREE-WAY INSTALLED LOUDSPEAKER
KEY FEATURES
3-way system with coaxial mid and high drivers
Selection of 80x50 or 50x40 rotatable horns
Exceptional pattern control using Mathematically
Modeled Dispersion™
Single loudspeaker design with interchangeable
backplate options
Full range passive crossover backplate
Direct wire backplate for biamplification
K8 compatible, actively tuned, self-powered backplate
Single cable digital audio distribution, monitoring and
remote control when used with K8
Simple and light weight array rigging accessories
PRODUCT DESCRIPTION
The IS twelve three (123) series of loudspeakers are specifically designed for providing reinforcement in fixed installations
where high sonic performance and flexibility in precise pattern control are critical. Precision designed with Mathematically
Modeled Dispersion™ the twelve three series provide exceptionally linear pattern control through crossover making the
series perfect for critical applications. Self powered versions used in conjunction with Klein+Hummel K8 products provide
a factory tuned and easily-managed reinforcement system for night clubs, auditoriums, houses of worship, performance
halls, arenas and stadiums.
IS 123 LOUDSPEAKER
12” THREE-WAY INSTALLED LOUDSPEAKER
TECHNICAL SPECIFICATIONS
Drivers LF: 12“ with 4“ voicecoil
MF/HF: 2“/1“ dual concentric driver, horn loaded
Useful operating frequency range 58 Hz to 22 kHz
Smooth frequency range
(fullrange and active versions only)
System sensitivity
(with passive crossover)
Driver sensitivity LF: 97dB 1W/1m
Coverage pattern 80° horizontal x 50° vertical, nominal, field rotatable (85 Option)
Directivity Factor (Q) tba
Directivity Index (DI) tba
Passive crossover LF/MF 600 Hz, 2nd order
Impedance LF: 4 ohms, MF/HF: 16 ohms
Crossover impedance
(fullrange version only)
Maximum SPL measured (fullspace) 133 dB, peak
Maximum SPL calculated (fullspace) 132 dB, peak
Power handling 800 watts rms, 1600 watts program, 3200 watts peak (10ms)
Input Speaker level, 2 Speakon NL4 (fullrange)
Output K8 link, passively coupled, (on active loudspeaker version)
Indicator lights K8 Sync, K8 Wink, Input Overload (active version)
Termination 4 position DIP, remote monitored (active version)
Cabinet material 18mm birch plywood
Cabinet finish black acrylic enamel
Grille Painted steel Grille, 64% open, foam backing
Weight 42kg (92 lbs), with passive crossover
Dimensions
(height, width at front, width at rear, depth)
Rigging points (12) M10 threaded points
Side angle 20° each
90 Hz to 19 kHz, +/- 3 dB
97 dB/1W/1m
HF/MF: 115dB 1W/1m
50° horizontal x 40° vertical, nominal, field rotatable (54 Option)
MF/HF 6500 Hz, 2nd order
4 ohms nominal, 3.2 ohms minimum
126 dB, average, 10% THD
119 dB, average, 3% THD
129 dB, average
Speaker level, 2 Speakon NL4 (direct wired for biamp)
+4 dBu, XLR female and terminal block (active version)
K8 input, K8 link (active version), K8 channel select, rotary switch (active version)
724mm H x 377mm W(front), 182mm W(rear) x 416mm D
28.5“ H x 14.8“ W (front), 7.2“ W (rear) x 16.4“ D
SPECS for 123 SP ACTIVE BACKPLATE OPTION
The self powered backplate shall provide digital signal
processing, biamplification, factory set tuning and
loudspeaker optimization, digital input compatible to
K+H K8 distribution standard; selector switch for K8 digital
channel which can be overridden in remote software; +4
dBu nominal analog input on XLR female and terminal
block connectors; wink LED for speaker identification;
input overload LED for analog input; analog input level
trim; remote monitored termination switch; remote control
and monitoring of amplifier including termperature, load
condition and performance.
IS 123 LOUDSPEAKER
12” THREE-WAY INSTALLED LOUDSPEAKER
RESPONSE GRAPHS
Vertical Coverage of: K+H IS 123 80x50 fullrange Horizontal Coverage of: K+H IS 123 80x50 fullrange
Vertical Coverage of: K+H IS 123 50x40 fullrange Horizontal Coverage of: K+H IS 123 50x40 fullrange
Impedence of: K+H IS 123 80x50 fullrange Frequency Response of: K+H IS 123 80x50 fullrange
IS 123 LOUDSPEAKER
MECHANICAL DRAWING
12” THREE-WAY INSTALLED LOUDSPEAKER
ARCHITECT & ENGINEERING SPECS
The sound reinforcement loudspeaker system shall utilize a 12” low frequency driver with 4” voice coil and a coaxial 2”/1”
mid/high frequency driver. The loudspeaker shall provide at least 97 dB sound pressure level at a distance of 1 meter
when driven with 1 Watt. The maximum peak sound pressure level shall be at least 132 dB. The coverage angle of the
high and mid frequency horn shall be 80 degrees horizontal x 50 degrees vertical, field rotatable or 50 degrees horizontal
x 40 degrees vertical, field rotatable and shall be desingned using Mathematically Modeled Dispersion™ technology. The
backplate shall be modular and externally removable with options for direct drive through Neutrik NL4 connectors, passive
crossover electronics with Neutrik NL4 connectors or an active amplified backplate, all field installable. The frequency
response shall be usable in an equalized system between 58 Hz and 22 kHz, +/- 3dB.
K+H Ver triebs- und Entwicklungsgesellschaf t mbH
Auf dem Kessellande 4A
30900 Wedemark
Germany
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