JBL K2 S9900
High-end 3-way JBL floorstanding speaker with compression drivers, designed for precise reproduction in large installations.
Description
The JBL K2 S9900 is a high-end 3-way floorstanding speaker, built around compression drivers for the treble and midrange, paired with a 380 mm woofer in pure cellulose pulp. It draws on design elements from JBL's Paragon, Hartsfield and Everest ranges.
The ultra-high-frequency (UHF) section relies on a 25 mm beryllium-dome compression driver (045Be-1), handed over to a 100 mm magnesium compression driver (476 Mg) for the treble. The frequency response spans from 48 Hz to 50,000 Hz (-6 dB), with crossover points set at 900 Hz and 15,000 Hz, reflecting a clearly separated three-way design. The 93 dB sensitivity and 6 ohm impedance allow for a high sound level without requiring excessive amplification power, with recommended amplification of 500 W RMS.
With dimensions of 1200 x 560 x 350 mm and a mass of 83 kg per speaker, the K2 S9900 is aimed at spacious installations capable of accommodating a system of this scale. It suits listeners seeking a precise stereo image and dynamic reproduction, for demanding listening at high volume.
Technical specifications
| Sensitivity | 93 dB |
| Impedance | 6 ohms |
| UHF driver | 25 mm compression driver (045Be-1) |
| HF driver | 100 mm compression driver (476 Mg) |
| LF driver | 380 mm woofer, pure cellulose pulp |
| Frequency response | 48 - 50,000 Hz (-6 dB) |
| Crossover frequency | 900 Hz - 15,000 Hz |
| Recommended amplification | 500 W RMS |
| Dimensions (H x W x D) | 1200 x 560 x 350 mm |
| Mass | 83 kg |
What to check before buying used
The UHF and HF compression drivers should be tested across the full frequency range to detect any loss of efficiency or distortion, particularly on the beryllium dome of the UHF section. The 380 mm cellulose pulp woofer warrants a visual check of the cone and suspension, which are sensitive to time and humidity. The considerable weight of each speaker (83 kg) means the cabinet and internal fixings should be checked for condition after any transport.
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