JBL 4675C Cinema Loudspeaker System, 600W Power Capacity, 34 Hz to 20 kHz Frequency Range

The JBL 4675C provides powerful, smooth and accurate reproduction of motion picture soundtracks in medium and large cinemas. The system is comprised of two parts: the 4675D-HF high frequency pack and the 4638TH low frequency system. The 4675C-HF high frequency pack features the JBL 2446H, 100 mm (4") diaphragm compression driver, JBL 2360A Bi-Radial horn and JBL 2506B fully adjustable bracket. The large format Bi-Radial horn ensures uniform dispersion of the high frequency information throughout both the vertical and horizontal coverage angles.

The 4638TH employs the latest in JBL low frequency transducer technology offering exceptional performance benefits. The JBL 2035H 380 mm (15") transducer employs a copper-sleeved magnetic pole piece providing a stabilized magnetic field, which provides lower second and third order harmonic distortion and flat power response. The copper-sleeved pole piece reduces flux modulation and acts as a shorted turn causing the impedance curve to flatten at higher frequencies. This helps in maintaining a smooth transition between the low and high frequency devices in the crossover region producing, among other things, accurate reproduction of dialog throughout the entire listening area.

The JBL 4638TH utilizes a new 600 watt IEC pink noise rated crossover, which features Constant-Coverage horn equalization for both 2380A and 2360A Series Bi-Radial horns. The enclosure is constructed of dense stock and is extensively braced on all panels reducing cabinet resonances. Net internal volume is 225 liters (8 cu. ft.) and the enclosure is tuned to 40 Hz with large port tubes, ensuring minimum turbulence at full power input at low frequencies.