JBL 2446H High Frequency Compression Driver

Technologically advanced for superior sound.

The model 2446H is a professional quality high-frequency compression driver that incorporates JBL's newly-developed Coherent Wave phasing plug as well as a pure titanium diaphragm with radial ribs and patented three-dimensional diamond pattern suspension.

The Coherent Wave phasing plug assembly consists of four die-cast annular aperture structures of constant path length to provide m-phase combining of diaphragm output at the driver's exit. This optimized configuration allows coherent summation of acoustical power up to much higher frequencies than afforded by earlier designs.

The diaphragm design includes JBL's exclusive three-dimensional diamond pattern surround1 which reduces membrane stresses in the diaphragm support structure and extends diaphragm life. The depth of the diamond pattern is closely controlled during the manufacturing process to provide predictable frequencies for the 2nd and 3rd normal resonance modes and for the basic suspension resonance mode.

The diaphragm also incorporates a series of embossed radial reinforcing ribs that increase diaphragm stiffness. This diaphragm, when combined with the Coherent Wave phasing plug, increases the 2446H/J's output in the 5 kHz to 20 kHz range.

JBL 2446H High Frequency Compression Driver Features:

100 watts continuous program at 500Hz
150W continuous program at 1 kHz and higher
Coherent WaveTM phasing plug design for increased high-frequency output
100mm (4 in) pure titanium diaphragm with radial-rib topology and patented three-dimensional
diamond pattern suspension
100 mm (4 in) edgewound aluminum voice coil
49mm (2 in) throat exit diameter

JBL 2446H High Frequency Compression Driver Specifications:

Positive voltage to black terminal gives diaphragm motion toward the phasing plug
Dimensions: 235mm (91/4 in) diameter
131 mm (5 in) depth
Mounting: Four 1/4-20 threaded holes, 90 apart on 101.6 mm (4 in) diameter
Net Weight: 13.8 kg (301/2 lb)
Specifications:
Throat Diameter: 49 mm (2 in)
Nominal Impedance: 2446H 8 ohms
2446J 16 ohms
Minimum Impedance: 6 ohms (H), 12 ohms (J) @ 5 kHz
DC Resistance: 4.3 ohms (H), 8.5 ohms (J) 10% @ 25 C
Power Capacity1: 100 W continuous program above 500 Hz
150W continuous program above 1 kHz
Sensitivity: 111 dB SPL, 1 W @ 1 m on-axis on horn2
118 dB SPL, 1 mW on plane-wave tube3
Nominal Efficiency: 30% (500 Hz to 2.5 kHz)
Frequency Range: 500 Hz to 20 kHz
Recommended Crossover: 500 Hz or higher, 12 dB/octave minimum
Diaphragm: 0.05 mm (0.002 in) pure titanium
Voice Coil Diameter: 100 mm (4 in)
Voice Coil Material: Edgewound aluminum ribbon
Flux Density: 1.9 T (19,000 gauss)
Bl Factor: 12.7