MIRAGE M-3
¥ 520,000 (a set of two cars, around 1990)
Commentary
A speaker system incorporating bipolar technology to improve directivity.
Wide-directional speaker units are placed on the front and rear baffles to drive in phase.
In the case of a rear open type bipolar flat plate speaker, it was not possible to realize such wide-directional characteristics because it is generally a plane wave with opposite phases in front and rear and it is strongly affected by phase interference. However, with this technology, almost 360 degree non-directional diffusion characteristics are obtained.
The M-1 is a 3-way 5-unit configuration, with the exception of the woofer mounted on the front and rear respectively.
For each band, the ハイパーポリック Dome Tweeter which maintains quick transient characteristics and low distortion rate flat response over the 180 degree directional range in the high band. For the middle band, fast response wide band mid-range by carbon added polypropylene light mass cone with 3 layers laminate is adopted. For the low band, it adopts carbon added polypropylene vibrating plate with special treatment and high input resistant long stroke woofer which adopts 38 mm φ voice coil and プチルゴムエッジ.
The enclosure uses CAD design and CAM processing technology to limit dimensional error to ± 100 microns.
In addition, high density fiberboard is used and the generation of natural resonance and standing wave is eliminated by strong tongue joint structure, internal partition wall and solid angle reinforcement.
All units are flush capes submerged in the baffle surface to avoid the influence of diffracted waves. In addition, the corners are curved, and the grill cloth is fixed on the same plane as the baffle with no gap so as not to interfere with good diffusion patterns.
The surface finish of the wooden part is black gloss finish.
The network section is developed by computer modeling to ensure the most neutral response and tone balance in all 360 ° directions, and is tuned with carefully selected parts and hearing tests.
The input terminal supports bi-wiring and bi-amplifier.
Model Rating
| Type | 3-way 5-speaker bipolar bass reflex floor type |
| Units Used | For low band : 25.4 cm cone type For Medium Range : 11.4 cm Cone Type x2 For High Pass : 1.9 cm Dome x2 |
| Frequency characteristic | On-axis : 30 Hz to 20 kHz ± 2 dB Off-axis : 30 Hz to 18 kHz ± 2 dB |
| Practical low-pass characteristic | 24 Hz (-10dB anechoic chamber) |
| Impedance | 7 Ω (4 Ω minimum) |
| Max Input | Continuous : 200W Peak : 300W |
| Output sound pressure level | 85.5dB/2.83V/m |
| Crossover frequency | 400 Hz, 2.2 kHz |
| External dimensions | Width 461x Height 1337x Depth 211 mm |
| Weight | 59kg |