JBL 4331B/4331BWX
4331B : ¥ 450,000 (1 unit, around 1981)
4331 BWX : ¥ 470,000 (1 unit, around 1981)
Commentary
A 2-way speaker system which is the successor of 4331A.
It is equipped with a 38 cm cone type woofer 2231H in the low range.
The 2231H uses newly developed cone paper with optimum mass and stiffness, and combined with edgewise rolled copper ribbon voice coil and strong magnetic circuit, excellent low sound reproduction is possible even at large input.
A horn type unit that combines horn 2312, lens 2308 and driver unit 2420 is installed in the middle and high range.
The directivity is improved by combining an acoustic lens.
The network section can be driven by built-in network or by 2-channel multi-amp drive.
The enclosure uses a bass reflex system.
There are two variations on the enclosure finish : the 4331B has a gray finish and the 4331 BWX has a walnut finish.
Model Rating
Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
Unit | Low Band : 38 cm Cone Type (2231H) For High Frequency : Horn Type (2308 + 2312 + 2420) |
Playback frequency band | 35 Hz to 15 kHz ± 3 dB |
Crossover frequency | 800Hz |
Directional | 60 ゜ x30 ゜ (16 khz) |
Impedance | 8 Ω |
Output sound pressure level | 93dB/W/m |
Allowable input | 75W (network) 75W (800 Hz or Less) 30W (800 Hz or more) |
Enclosure volume | 156L |
External dimensions | Width 619x Height 778x Depth 497 mm |
Weight | 58.5kg |