The JBL 4349 studio monitor is a compact, high-performance loudspeaker built around the patented JBL D2415K 1.5-inch compression driver coupled to a large-format horn, along with a 12-inch pure pulp cone woofer. This combination delivers music with an authority and precision not possible with traditional loudspeaker designs.
Designed and manufactured in JBL's world-renowned acoustic engineering facility in Northridge, California, the 4349 studio monitor is a showcase of JBL's patented acoustic technologies. This monitor features a two-way design with patented High Definition Imaging (HDI™) horn technology, the patented D2415K 1.5-inch (38 mm) dual compression driver and a 12-inch (300 mm) cast-frame pure pulp cone woofer for powerful dynamics and incredibly accurate sound reproduction.
JBL's revolutionary horn geometry with high-definition imaging is the result of intensive research into the nuances of horn design. In pursuit of exceptional high-frequency detail and uniform directivity for smooth room response, JBL engineers pioneered a design that delivers a neutral frequency response both on-axis and off-axis and provides a seamless transition between high and low frequency drivers.
The JBL D2415K compression driver benefits from advanced research and applications derived from JBL Professional's "D2" range of transducers. At the core of the D2415K is a pair of lightweight polymer ring diaphragms that improve high frequency extension by reducing diaphragm mass. The V-shaped geometry of the ring diaphragm reduces breakdown modes, eliminating time smearing and reducing distortion.
The result is incredible dynamics with accurate reproduction and a lack of power compression. The "D" prefix indicates that this driver uses dual diaphragms, dual voice coils and dual motors for an incredibly efficient design. High frequency and ultra-high frequency tone adjusters are located on the front panel below the speaker and allow the sound to be tailored to the specific environment and listener preference.
These controls work in conjunction with an advanced crossover network design that features air-core inductors, wire-cast resistors and low ERS metallised film capacitors in a multi-layer configuration to optimise the performance of the 4349's components. The multi-layer technique improves series capacitance by averaging their values while reducing ESR and distortion.
The 4349's powerful 12-inch (300 mm) woofer takes advantage of JBL's core engineering techniques to ensure very high output with low distortion. The 3-inch (75 mm) long-throw voice coil along with dual opposed spider dampers ensure maximum output with significantly reduced distortion. A pure pulp cone provides a lightweight, stiff diaphragm and helps eliminate break-up modes by ensuring proper pistonic movement throughout the operating band.
The 4349's enclosure is heavily reinforced with 1-inch (25 mm) thick walls to provide a solid acoustic foundation and incorporates a bass reflex design with dual front-firing, computer-optimised flared ports. The cabinet features a classic JBL studio monitor design with a blue baffle and is finished in a choice of satin walnut or black walnut furniture-grade wood veneers.
A blue (Walnut) or black (Black Walnut) fabric grille completes the elegant look. Two sets of gold-plated binding posts provide a secure connection and offer a choice of single-ended or two-wire/bi-amped connections.
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