JBL 2390
Released in 1971
¥ 85,900 (1 unit, around 1973)
Commentary
Horn lens composed of a combination of horn throat and lens.
It uses a hyperbolic plate (slant plate) designed based on precise calculation and is used at 800 Hz or higher.
The lens part has a plate bent into a 45 ° wave shape to shorten the depth.
The horn to be connected is a square exponential horn and the driver is 5 cm in diameter.
The lens is mounted on the baffle surface.
If it is placed outside the enclosure, use a baffle plate between the lens and horn, with a minimum width of 51 cm on either side of the lens.
Model Rating
| Type | Horn lens |
| Directional (Horizontal x Vertical) | 100 ゜ x45 ゜ |
| Crossover frequency | 800Hz |
| Sound pressure level (new JIS) | 107dB |
| Throat diameter | 5cm |
| Baffle plate mounting dimensions | 15.2x22.9cm |
| External dimensions | Horn : Width 267x Height 191x Depth 305 mm Lens : Width 505x Height 178x Depth 118 mm |
| Weight | 5.0kg |
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