JBL L40A
¥ 88,000 (1 unit, around 1981)
¥ 100,000 (1 unit, around 1980)
Commentary
A speaker system developed in pursuit of the possibilities of bookshelf type speakers.
It is equipped with 127H of 25 cm cone type woofer in the low range.
Low-frequency characteristics are improved by a large low-distortion magnetic circuit and a unique shell (acoustic resistance) that improves low-frequency fo impedance characteristics.
In addition, technologies such as corrugated cone paper to prevent disturbance in the high-frequency range and a 5 cm diameter precision processed voice coil with improved transient response and efficiency are adopted. In addition, a 10 cm diameter center dome is installed to smooth the connection with the tweeter, and the characteristics of the mid-frequency range with a large amount of information are improved.
033 of 2.5 cm dome type tweeter is is used for the high frequency.
It uses phenolic treated hard diaphragm, 2.5 cm diameter aluminum ribbon voice coil and 14000 Gauss magnetic circuit to improve acoustic characteristics such as low distortion rate and high efficiency.
The network section is composed of high-precision coils and resistors, and is equipped with continuous variable level control for high frequency.
Model Rating
| Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
| Units Used | For Low Band : 25 cm Diameter Cone Type (127H) For High Range : 2.5 cm Diameter Dome Type (033) |
| Allowable input | 35W (continuous program) |
| Impedance | 8 Ω |
| Crossover frequency | 1800Hz |
| Output sound pressure level | 88dB/W/m |
| External dimensions | Width 381x Height 584x Depth 302 mm |
| Weight | 20 kg (when packed) |