JBL 4660 Loudspeaker

One JBL 4660 Speaker system, painted, with three (3) mounting points.
FEATURES: The Model 4660 Sound Reinforcement Loudspeaker System is the first of its kind. It is Compact Sound Reinforcement System. 99dB sensitivity, IW, Im (3.3 ft). designed to provide controlled coverage in a normal rectangular space so that, at frequencies above I kHz. the coverage is very uniform in both the front and back of the room. _ The high-frequency coverage pattern is symmetrical from side to side, but it is skewed front to back in such a way that the nominal front coverage angle is I IO degrees, while the nominal back coverage angle is 38 degrees. The 4660 system is ideal for moderate to large 40 Hz to 15 kHz frequency range. Skewed Coverage (I IO degrees front - 38 degrees back) for ideal performance in rectangular rooms. Unique Patented Bi-Radial Horn Design. 150 Watts Input Power Capacity. 380mm (I 5 in) Low-frequency Transducel: meeting rooms and moderate-size houses of worshb. In most cases, it will provide a degree of speech coverage which, if achieved with conventional’components, would require three or more high-frequency devices. SYSTEM CONCEPT The Model 4660 defined coverage system is designed to normally cover a rectangular space with an aspect ratio of 2 by 2.75. The system is ideally placed 0.6 unit high and 0.35 unit beyond the front coverage edge. HIGH-FREQUENCY PERFORMANCE The unique high-frequency horn* was designed according to the same principles used in the design of JBL’s Bi-Radial horn family. Accurate pattern control is maintained at high frequencies, and smooth loading is maintained down to the crossover frequency of 800 Hz. The high-frequency driver is the model 2425J. The integral dividing network contains power response correction circuitry, which maintains very flat and smooth response in all directions over the solid angle covered by the system. LOW-FREQUENCY PERFORMANCE Below 800 Hz, smooth coverage is provided down to 40 Hz by the model 2225H 380mm (15 in) low-frequency transducer mounted in a ported 195 liter (6.9 cu ft) enclosure.