YAMAHA JA-4271
¥ 39,000 (1 piece, around 1980)
Commentary
This is a horn driver unit for mid-range applications with low cost by changing the magnetic circuit of JA-4270.
It uses a special aluminum alloy diaphragm integrally molded with tangential edges, and a pure aluminum edgewise wound lightweight voice coil.
The equalizer and throat are machined from pure zinc.
.JPG)
.JPG)
.JPG)
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 | 106dB/W · m |
| Diaphragm | Dome shaped aluminum alloy |
| Voice coil diameter | 42.6 φ mm |
| Equalizer | Zinc gouging |
| Magnet | Ferrite, 0.85 kg |
| Magnetic flux density | 18,000gauss |
| Total flux | 72,300maxwell |
| Applicable Horn | H-1400 H-2331 |
| Throat diameter | 20mm |
| External dimensions | Diameter 140 mm x Height 105.3 mm |
| Weight | 3.7kg |