CORAL 12TX-50
¥ 16,000 (1 unit, around 1965)
Commentary
30cm3-way coaxial speaker unit of Coral Golden 50 series.
The 30 cm cone type woofer and the cone for mid-range use are connected coaxially by the same magnetic circuit in a mechanical 2-way structure.
The center is equipped with a horn type tweeter for high frequencies.
The mid-range cone has a braking hole for reflection resonance control, and has excellent characteristics over the entire range.
The edge part of the woofer uses a skybar edge.
This is a variant of the free edge and is used overseas as roll surround edge.
The magnetic circuit uses a pole yoke made of NKS magnet and high-purity iron material to improve efficiency.
The voice coil uses a long travel type to prevent the voice coil from coming off even at a large amplitude from the next time.
Duralumin diaphragm of 20 micron thickness is used for the vibration plate of the tweeter.
We have also adopted an aluminum edge-wise voice coil for the voice coil and a newly combined magnetic circuit for improving the level of the tweeter.
A rectangular diecast horn is used for the horn section.
A tweeter equalizer adjusts the phase shift of the sound from the diaphragm.
A prominent frame has been adopted for the frame part.
This frame structure reduces unnecessary distortion when mounted in a cabinet.
It has a built-in network.
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Model Rating
| Type | 30cm3-way coaxial speaker |
| Playback frequency band | 18 Hz to 22 kHz |
| Lowest resonance frequency (fo) | 15 Hz to 28 Hz |
| Crossover frequency | 400 Hz (mechanical), 2.5 kHz |
| Output sound pressure level | 102dB |
| Program input | 25W |
| VC impedance | 16 Ω |
| Effective mass of vibration system | 35g |
| Qo | 0.454(20Hz) |
| Magnetic flux density | Low pass : 9,800 gauss High : 13,000 gauss |
| Total flux | Low : 160,000 maxwell |
| Weight | 5.5kg |