JBL 8140H
Price unknown (1 unit, around 1983?)
Commentary
8000 series 20 cm coaxial 2-way speaker.
The 8140H is a 20 cm cone shaped woofer with a Piezo Ceramic tweeter.
The 8000 Series is a high-efficiency speaker series developed for broadcasting, BGM and other distributed sound systems. It features high intelligibility, wide directivity and high input resistance.
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Model Rating
| Type | 20 cm coaxial 2-way unit |
| Impedance | 8 Ω |
| Allowable input (continuous program) | 40W |
| Sound pressure level | 97dB/W/m |
| Crossover frequency | 2.5kHz |
| Frequency characteristic | 100 Hz to 10 kHz ± 4 dB |
| Voice Coil Diameter x Length | 25x6.9mm |
| Magnetic flux density | 11,000gauss |
| Effective mass | 10.1g |
| External dimensions | Diameter 205x depth 72 mm |
| Weight | 1kg |
| Thiele-Small Parameters | |
| fs | 95Hz |
| Re | 7.2 Ω |
| Qts | 0.86 |
| Qms | 4.0 |
| Qes | 1.09 |
| Vas | 17L |
| SD | 0.021m2 |
| Xmax | 2.5mm |
| VD | 52.5cm2 |
| Le | 0.3mH |
| Η0(Half space) | 1.3% |
| Pe(max) (continuous sine wave input) | 20W |
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