Klein-hummel IS 123 User Manual

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.