JBL 4350 pair with JBL Frequency divider model 5234.

Extremely wide-band linear response characteristics, high acoustic output, controlled dispersion pattern. Components: two 380 mm (15 in) low frequency loudspeakers, 300 mm (12 in) midrange loudspeaker, high frequency compression driver with horn/lens assembly, diffraction horn ultra-high frequency driver. Rigidly constructed enclosure provides separate acoustic loading of the low frequency and midrange loudspeakers and provides for mirror image mounting of the high frequency and ultra-high frequency drivers.

The 4350 Studio Monitor.

The JBL 4350 is the result of an engineering study undertaken to create, regardless of cost, the optimum studio loudspeaker for monitoring recording sessions and for final mixdown of master tapes A four-way system designed for bi-ampldicahon, it achieves inherently smooth reproduction within three dB from 30 Hz to 20 kHz. controlled high frequency dispersion, and exceptional transient performance. In addition, the 4350 is capable of wide dynamic range with low distortion, and of the high acoustic output required for precise reproduction of the original sounds. It is an indispensable tool, not only for mastering and mixdown. but also for subjective analysis of the entire studio recording and reproducing complex.

Bi-Ampltiication

The two low frequency loudspeakers are driven independently of the other components in the system This allows the utilization of two moderately powered amplifiers rather than a single, large model, and lessens the possibility of distortion, even at high volume levels.

Low Frequency Loudspeakers

Two 380 mm (15 in) low frequency loudspeakers. mounted in a ported enclosure, provide accurate reproduction and high power handling capacity at very low frequencies The use of two drivers results in a 3-dB increase m acoustic output and allows twice the power input to the low frequency section. Each loudspeaker is driven by a 100 mm (4 in) diameter voice coil. fabricated of edgewound copper.

Low Frequency Loudspeakers

Two 380 mm (15 in) low frequency loudspeakers. mounted in a ported enclosure, provide accurate reproduction and high power handling capacity at very low frequencies The use of two drivers results in a 3-dB increase m acoustic output and allows twice the power input to the low frequency section. Each loudspeaker is driven by a 100 mm (4 in) diameter voice coil. fabricated of edgewound copper ribbon wire, and an 8 5 kg (18% lb) magnetic assembly with a flux density of 1.2 T (12,000 gauss). The magnetic structure incorporates JBL's unique Symmetrical Field Geometry (SFG) design that reduces second harmonic distortion to inconsequential levels. A compliant cone termination allows long excursions and damps spurious reflections traveling within the cone material.

Midrange Loudspeaker

Music fundamentals lying in the region between 250 Hz and 1.1 kHz are reproduced by a 300 mm (12 in) \> loudspeaker housed in a sealed sub-chamber and driven by a 100 mm (4 in) edgewound copper ribbon voice coil. The SFG design of the magnetic structure results in exceptionally low levels of second harmonic distortion. The magnetic assembly weighs 8.5 kg (18% lb) and produces a flux density of 1.2 T (12,000 gauss) in the voice coil gap. The driver achieves high acoustic efficiency and effortless reproduction, even at extreme volume levels.

High Frequency Compression Driver

Reproduction from 1.1 to 9 kHz is accomplished by a massive compression driver energized by a magnetic assembly weighing 11 kg (23.75 lb). Its 100 mm (4 in) edgewound aluminum ribbon voice coil, suspended in a magnetic field of 1.8 T (18,000 gauss), drives a diaphragm pneumatically drawn to shape from 0.08 mm (0.003 in) aluminum alloy. Proper phasing of the wavefront is assured by use of a phasing plug. The combination of an extremely powerful, efficient magnetic assembly, edgewound voice coil and large yet lightweight diaphragm results in exceptional transient response and dynamic range