The 4000 Series of cinema loudspeakers meets the needs of sound designers and theater owners, delivering the finest sonic reproduction possible. These JBL Cinema Sound Systems are designed for biamplified applications as well as systems with built-in passive crossover networks. The passive cinema systems feature new low frequency transducer technology utalising a newly designed magnetic structure that reduces both second and third order harmonic distortion. A new copper shorting ring allows this driver to provide more constant power response which allows the low frequency cabinets to deliver equal energy into the listening space at all frequencies. Those systems designed for biamplified applications incorporate JBLs exclusive Vented Gap Cooling (VGC) woofers which significantly reduces the operating temperature of the voice coil, thereby delivering maximum peak impact with minimal power compression.

Direct-Radiator High-Power Shallow Profile Cinema System.
The JBL 4670D provides powerful, smooth and accurate reproduction of cinema soundtracks from a compact and cost effective system. The system is comprised of two parts: the 4670D-HF high frequency pack and the 4638TH low frequency system.