JBL 3120
Released in 1971
¥ 32,900 (1 unit, around 1973)
¥ 25,000 (1 unit, around 1978)
¥ 24,000 (1 unit, around 1981)
¥ 30,000 (1 unit, around 1983)
Commentary
A dividing network with a crossover frequency of 1.2 kHz.
It consists of high-quality components such as high-voltage non-polar capacitors, individually calibrated low-loss inductors, resistors and switches that can withstand severe use.
The network employs a circuit with a cutoff characteristic of 12dB/oct, and an impedance correction circuit is employed for the low frequency to obtain the crossover frequency accurately.
Equipped with an attenuator that uses a coil tap.
Model Rating
| Type | Dividing network |
| Crossover frequency | 1.2kHz |
| Allowable input (continuous program) | 75W |
| Impedance | Bass range : 8 ~ 12 Ω High range : 12 ~ 16 Ω |
| High-frequency attenuation | 0, 3, 6 dB switch |
| Mounting hole | Width 140x108mm |
| Weight | 1.1kg |
.jpg)