.jpg)
YAMAHA JA-0506
¥ 15,000 (1 unit, around 1970)
Commentary
Horn type tweeter developed as a part of NS series.
Special hard duralumin foil of 30 μ thickness is used for the diaphragm.
In addition, tangential corrugation edge is used for the edge.
The voice coil is 23 mm in diameter and is edgewise wound with aluminum ribbon wire.
In addition, a 40 φ diameter magnet is used.
An aluminum hollowed horn is used for the horn part.
In addition, it is equipped with an equalizer with the same aluminum precision processing finish, and realizes a tweeter with excellent frequency characteristics and wide directivity.
Actual measurement data measured in the measurement room was attached to each product.
.JPG)
Model Rating
| Type | Horn type tweeter unit |
| Impedance | 8 Ω |
| Rated input | 4W (listed in 1973 catalog) |
| Rated allowable input | 20W (listed in 1970 catalog) |
| Fo / cut-off frequency | 3 khz (listed in 1973 catalog) 2.4 kHz (1970 catalog) |
| Frequency characteristic | 3 kHz ~ 20 kHz (listed in 1973 catalog) 2.4 kHz ~ 20 kHz (listed in 1970 catalog) |
| Output sound pressure level | 109dB/W/m (listed in 1973 catalog) 115dB/W (1970 catalog) |
| Crossover frequency | 4 khz or more (listed in 1970 catalog) |
| Magnetic flux density | 17,000gauss |
| Total flux | 50,000 maxwell (listed in 1973 catalog) 24,600 maxwell (listed in 1970 catalog) |
| External dimensions | Width 78x Height 78x Depth 86.7 mm |
| Weight | 1.3kg |
