JBL’s K2 S9900 Loudspeakers

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JBL’s new K2 S9900 floorstanding loudspeaker is the latest entry in JBL’s K2 series of freestanding full-range loudspeakers. Building upon the design and engineering of the JBL K2 9800, the new K2 S9900 expands its frequency response down to 33 Hz via a new low-frequency extender, giving it a total range of 33Hz to 50 kHz with 900 HZ and 15 kHz crossover points.

“The JBL K2 S9900 provides the custom home systems integrator a new standard in luxury-tier loudspeakers to offer their clients,” market director of Harman Performance AV Group, Kevin Voecks, said.

The K2 S9900 is also 35 percent more powerful than its predecessor, with a power handling rating of 500 Watts (RMS). And while the KS 9900 continues the K2 Series tradition of utilizing the proven 15-inch (380mm) diameter fiber-pulp cone low-frequency driver, the K2 S9900ís four-inch (100mm) high-frequency compression driver is a third larger than that of the K2 S9800, and is topped with a one-inch (25mm) ultra high-frequency driver.

For home theaters, the JBL K2 S9900 offers 100 x 60 degrees of vertical high-frequency coverage and 60 x 30 degrees of coverage. It also offers user-controllable high-frequency and presence level controls, as well as a LF/HF drive mode switch that toggles between normal and bi-amp operation. The K2 S9900’s 1500AL woofer features JBL’s Alnico 5DG magnet, a two-inch (50mm) aluminum shorting ring below the voice-coil gap, combined with 15 0.03-inch (0.8mm) copper rings and sixteen 0.06-inch (1.6mm) steel rings that form an inner gap ring assembly, effectively stabilize the local and global magnetic fields.

The compression drivers benefit from JBL's vented-gap cooling system, which employs three air tunnels running from the pole-piece to the magnet cover to efficiently radiate the heat generated by the voice coil, while also controlling the back pressure of the unit.