"Preliminary Information"

The IS fifteen three (153) 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 Modelled Dispersion ™ the twelve three series provide exceptionally linear pattern control through crossover making the series perfect for critical applications. Active versions used in conjunction with Klein+Hummel K8 products provide a factory tuned and easily-managed reinforcement system for night clubs, auditoria, houses of worship, performance halls, arenas and stadiums.

Driver Sizes and Types	15" woofer with 4" voicecoil + 2"/1" dual concentric Horn
Frequency Response	(+/- 3 dB) 85 Hz to 19 kHz, ( -10 dB)55 Hz to 22 kHz
Sensitivity of loudspeaker system with passive crossover (fullspace)	97 dB/1W/1m
Sensitivity of individual drivers	97dB/1W/1m woofer, 115dB/1W/1m MF/HF
Coverage Pattern, nominal	50° x 40°
Directivity Factor (Q)	tba
Directivity Index (DI)	tba
Passive Crossover point, slope and type	LF/MF: 600 Hz - 2.order, MF/HF: 6500 Hz - 2.order
Impedance of individual drivers	4 ohms woofer, + 16 ohms MF/HF
Impedance of passive crossover	4 ohms nominal - 3,2 ohms minimal
Maximum SPL: average and peak, measured (fullspace)	3% THD: 121 dB SPL, 10% THD: 128dB SPL, Peak: 135 dB SPL
Maximum SPL: average and peak, calculated (fullspace)	129 dB SPL, Peak: 132 dB SPL
Power Handling: RMS, program and peak (10ms)	800 watts rms, 1600 watts program, 3200 watts peak (10ms)
Cabinet material	18 mm birch plywood
Cabinet finish	Black acrylic enamel
Grille	Painted steel Grille, 64% open, foam backing
Weight	46kg, with passive crossover
Dimensions	H: 774 mm, W(front): 437 mm, W(rear): 182 mm, D: 501 mm
Rigging points	12 M10 threaded bits for attaching mounting accessories
Side angle	20° each side
Connectors	2 Speakon® NL4, 1+/1-