JBL 2241H
Released in 1991
¥ 86,100 (tax included, 1 unit, around 2007)
Commentary
VGC series 46 cm cone type woofer unit.
The VGC series realizes smooth characteristics without distortion with extremely low power compression (decrease in effective sensitivity) despite high output.
In order to achieve both high sound quality and high output, it uses the Ventilated Gap Cooling technology. By introducing air directly into the voice coil, heat radiation is remarkably improved. In addition, by polishing the Symmetrical Field Geometry magnetic circuit and suspension design, performance improvements such as low distortion rate, weight reduction and increased displacement have been achieved.
Model Rating
| Type | 46 cm cone type woofer unit |
| Nominal bore | 460mm |
| Nominal impedance | 8 Ω |
| Allowable Input (AES) | 600W (50 Hz to 500 Hz) |
| Sensitivity (1W, 1m) | 98 dB SPL (100 Hz to 500 Hz) |
| Frequency range (-10dB) | 30 Hz to 3 kHz |
| Power compression | 4.3dB(600W) |
| Distortion factor | Second harmonic : not more than 1.0% Third harmonic : 1.0% or less |
| Recommended maximum crossover frequency | 800Hz |
| Recommended enclosure volume | 140 to 340 lit |
| Voice coil | Φ 100 mm Edge-wound aluminum ribbon |
| Polarity (direction in which the cone moves when a positive voltage is applied to the red terminal : + : front / - : rear) | - |
| Dimensions | Diameter 464x Depth 190 mm |
| Baffle opening diameter | Front Mounting : 427 mm Rear Mounting : 428 mm |
| Discharge volume | 8.5lit |
| Weight | 10.7kg |
| Fs (resonant frequency of driver in free space) | 35Hz |
| Qts (sum of driver Q at fs including all loss mechanisms) | 0.40 |
| Qms (Q of driver at fs including only mechanical loss) | 5.7 |
| Qes (driver Q at fs including electrical losses only) | 0.43 |
| Vas (volume of air having the same acoustic compliance as the driver support system) | 310lit |
| Eff (reference efficiency (sound load of half space)) | 2.9% |
| Pe (Max) (maximum input power due to thermal limit) | 600W |
| Xmax (peak value of linear displacement of cone (diaphragm)) | 7.6mm |
| Re (DC resistance of voice coil) | 5.0 Ω |
| Le (voice coil inductance) | 1.75mH |
| Sd (effective radiating area of cone (diaphragm)) | 0.124m2 |
| BL product | 19.2T*m |
| Mms (effective mobile weight) | 145g |