JBL 4333A/4333AWX (1976)
The JBL 4333A is a three-way, three-speaker bass reflex studio monitor, released in 1976. It developed out of the earlier 4320 and 4331 models. It belonged to JBL's professional 43XX series, the large-format monitors that made up the company's studio presence through the 1970s and 1980s.
The drivers are standard JBL pro monitoring for the period. A 38 cm (15") cone woofer, model 2231A, handles the low band. The midrange is horn-loaded, using the 2308 acoustic lens, 2312 exponential horn and 2420 compression driver. A 2405 horn tweeter sits on top. Crossover points are 800 Hz and 8.5 kHz, and the network is rated for 75W below 800 Hz and 30W above. Rated impedance is 8 ohms, sensitivity is 93 dB (New JIS), and the stated frequency response is 35 Hz to 20 kHz ±3 dB. The enclosure is a 156-liter bass reflex cabinet measuring 619 × 778 × 497 mm and weighing 59 kg.
A few details set it apart. A rear switch allows two-channel multi-amping instead of the built-in network drive. The tweeter and acoustic lens rotate, so the speaker works either vertically or horizontally, which suits studio console layouts. Iron reinforcing fittings let the cabinet be suspended if needed.
It came in two variants: the 4333A in gray with a black grille, and the 4333AWX in walnut with a blue grille. Japanese pricing around 1978 was ¥440,000 for the 4333A and ¥455,000 for the 4333AWX, per unit.
Known Specs
- Type: 3-way, 3-speaker, bass reflex, bookshelf-type monitor
- Woofer: 38 cm cone (2231A)
- Midrange: Horn type (2308 + 2312 + 2420)
- Tweeter: Horn type (2405)
- Crossover: 800 Hz, 8.5 kHz
- Impedance: 8 ohms
- Sensitivity: 93 dB (New JIS)
- Frequency response: 35 Hz – 20 kHz ±3 dB
- Enclosure volume: 156 L
- Dimensions: 619 × 778 × 497 mm (W×H×D)
- Weight: 59 kg
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