YAMAHA JA-4270
¥ 87,000 (1 piece, around 1980)
Commentary
Horn driver unit for mid-range use using aluminum alloy diaphragm.
Alnico is used for the magnetic circuit.
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Model Rating
| Type | Horn driver unit for mid-range |
| Nominal impedance | 8 Ω |
| Playback frequency band | 500 Hz to 20 kHz |
| Recommended bandwidth | 800 Hz or more |
| Rated input | 10W |
| Max Input | 20W |
| Output sound pressure level | 107dB/W · m |
| Diaphragm | Dome shaped aluminum alloy |
| Voice coil diameter | 42.6 φ mm |
| Equalizer | Zinc gouging |
| Magnet | Alnico, 0.88 kg |
| Magnetic flux density | 18,500gauss |
| Total flux | 86,700maxwell |
| Applicable Horn | H-1230 (requires AD-2500) H-2330 |
| Throat diameter | 25.4mm |
| External dimensions | Diameter 140 mm x Height 131.9 mm |
| Weight | 6.5kg |