JBL 2447H/2447J
Released in 1993
¥ 115,500 (tax included, 1 unit, around 2007)
Commentary
High-pass compression driver unit with throat diameter 38 mm.
2447H is an 8 Ω model and 2447J is a 16 Ω model.
The phase plug has a coherent wave structure and is designed so that the phase plug can be directly connected to the horn throat.
The diaphragm is made of titanium and the edge of the unique diamond surround structure reduces metal fatigue and improves durability.
Ferrite magnet is used for the magnetic circuit of 2447.
Model Rating
| Type | Driver unit |
| Throat diameter | 38mm |
| Nominal impedance | 2447H : 8 Ω 2447J : 16 Ω |
| Allowable input (continuous program) | 100W(>500Hz) 150W(>1kHz) |
| Sensitivity (1W, 1m) | 112 dB SPL (1 kHz to 4 kHz with 2352 horn) |
| Frequency range (-10dB) | 500 Hz to 20 kHz |
| Recommended minimum crossover frequency | 500Hz |
| Diaphragm | Φ 100 mm, Pure Titanium |
| Voice coil | Φ 100 mm, Edge Rolled Aluminum / Ribbon |
| Polarity (*) | - |
| Magnetic flux density | 1.85T |
| Dimensions | Diameter 235x Depth 92 mm |
| Weight | 10.7kg |
| * When a positive voltage is applied to the red terminal, the direction in which the cone moves + : front / - : rear | |