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JBL 124A
¥ 59,000 (1 unit, released in 1975)
¥ 53,000 (1 unit, around 1978)
Commentary
This is a 30 cm cone shaped woofer that inherits 136A features such as durability and reliability.
Equipped with a mass control ring on the back of the center dome, the playback band is smoothly extended to the ultra-low band while preventing deformation of the voice coil and cone paper.
It uses a large diameter voice coil of 10.2 cm diameter and a strong magnetic circuit of 5.4 kg weight and 12,000 gauss magnetic flux density using an Alnico V magnet, and the main parts are the same as 136A.
Model Rating
| Type | 30 cm cone type woofer unit |
| Allowable input | 100W (continuous program) |
| Impedance | 8 Ω |
| Sound pressure level (new JIS) | 89dB |
| Voice Coil Diameter | 10.2cm |
| Magnet Assembly Weight | 5.4kg |
| Magnetic flux density | 12,000gauss |
| Recommended enclosure volume | 57L ~ 141L |
| Depth | 121mm |
| Weight (packed) | 7.3kg |
