DENON SC-507
¥ 65,000 (1 unit, released in 1983)
Commentary
This is a speaker system that follows the technology of SC-A7 and improves the quality of woofer by introducing the latest technology of DENON.
A 32 cm cone type woofer is installed in the low range.
The diaphragm is made into a corrugated rib structure by adding a special substance to polypropylene base material, large flat damper, long stroke voice coil with high heat-resistance treatment, barium ferrite magnet with 135 mm diameter, and aluminum die-cast frame are used for digital source.
The middle area is equipped with a 6.0 cm hard dome type skoker with α -Boron diaphragm.
This diaphragm is made of a material in which boron compound and alumina particles are fused in a porous state on the surface of an aluminum alloy foil. Boron compound and other materials are struck against the aluminum alloy foil at a speed close to the speed of sound in a high temperature of over 10,000 degrees Celsius by the plasma jet welding method to form a layer and physically bond the layers together. As a result, the diaphragm has approximately three times the rigidity of a titanium diaphragm and approximately ten times the internal loss of a conventional metal diaphragm.
In addition, strontium ferrite magnet, double suspension system support system and aluminum die-cast frame are adopted.
A 2.5 cm hard-dome type tweeter using α -Boron diaphragm is mounted in the high range as well as the middle range.
The aluminum die-cast frame and strontium ferrite magnet bring out the performance of the diaphragm.
Level control is provided for the middle and high frequencies.
The enclosure uses a rigid particle board and is a bass reflex type with a capacity of 70L.
Model Rating
| Method | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units Used | For low band : 32 cm cone type For Middle Area : 6 cm Dome Type For high-pass : 2.5 cm dome type |
| Playback frequency band | 30 Hz to 50 kHz |
| Maximum allowable input | 140W (program source) |
| Input impedance | 6 Ω |
| Average output sound pressure level | 92dB/W/m |
| Crossover frequency | 800 Hz, 5 kHz |
| Level control | Continuously Variable Mid Range and High Range |
| External dimensions | Width 390x Height 700x Depth 385 mm |
| Weight | Approx. 23 kg |