Audio Database

D-507F
Commentary

A 307 series tall boy speaker system developed as a full-fledged home theater speaker system.

Two 12 cm cone type woofers with OMF (ONKYO Micro Fiber) diaphragms are installed in the low range, and the twin drive system enhances the low sound reproduction capability.
This diaphragm is made of natural materials. It has a multi-layered structure consisting of non-woven fabric with fibers aligned in a certain direction and multiple layers of fibers aligned in different directions. In addition, both sides of the fiber layer are bound with unsaturated polyester resin and molded to increase the strength. In addition to the low natural vibration characteristic of natural fibers, the noise generated from the diaphragm itself is reduced. In addition, the damper is made of carefully selected materials with low natural resonance sound.
The S-line shape that minimizes the reflection of the propagation wave that occurs at the junction between the diaphragm and the edge is adopted for the edge part. In addition, the newly developed integrally molded S-line edge that is integrally molded with the diaphragm is adopted, which improves S/N.

A 2.5 cm soft dome type tweeter is installed in the high range.
The diaphragm is made of lightweight polyester mesh laminated with high-damping special urethane elastomer film. The shape reduces standing waves and expands the playback range to improve the connection with the woofer.

MDF materials are used for the entire enclosure, and reinforcing plates are incorporated inside the enclosure to increase the strength and disperse resonance frequencies.
Finished with Silver Hearts natural wood veneer paint finish.

Speaker terminal for banana plug is adopted.

Model Rating
Method 2-way, 3-speaker, bass reflex system, tall boy type, magnetic protection design (EIAJ)
Units Used Low Band : 12 cm cone x2
For high-pass : 2.5 cm dome type
Playback frequency band 38 Hz to 40 kHz
Max Input 120W
Rated impedance 6 Ω
Output sound pressure level 86dB/W/m
Crossover frequency 3kHz
Cabinet internal volume 24.7L
External dimensions Width 195x Height 930x Depth 295 mm
(including RUNNET and terminal protrusion)
Weight 12.0kg