ONKYO M55
¥ 27,500 (1 unit, around 1978)
Commentary
This is a speaker system that is small but aims for a powerful performance and the space required by a large system.
A 20 cm cone type woofer is installed in the low range.
In order to obtain the best constant in a closed cabinet, a cone type diaphragm with a balance weight is adopted to increase bass sound.
In addition, we have succeeded in improving input resistance by adopting polyimide bobbin which is strong for large input and 4-layer wound voice coil to increase driving force and prevent decrease of Qm.
In order to suppress harmful sharp high-frequency resonance and obtain a sense of fulfillment in the mid-range, we have adopted a dome-shaped radiator that also serves as a dust-proof cloth.
A 3-cm dome type tweeter is installed in the high range.
Using a frame with precision aluminum friction processing, it contributes to high-range transient and efficiency improvement by strengthening rigidity.
Uses an enclosure with an open pore finish made of real wood with excellent strength.
Model Rating
| Method | 2-Way, 2-Speaker, Airtight Type, Bookshelf Type |
| Units Used | For Low Band : 20 cm Cone Type (W2049A) For High Range : 3 cm Dome Type (TW314C) |
| Playback frequency band | 50 Hz to 20000 Hz |
| Max Input | 60W |
| Impedance | 6 Ω |
| Output sound pressure | 90dB/W/m |
| Crossover frequency | 2000Hz |
| Cabinet internal volume | 14L |
| Level control | Front operated level control |
| External dimensions | Width 235x Height 400x Depth 238 mm |
| Weight | 6.5kg |