DENON SC-503

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 22 cm cone type woofer is installed in the low range.
The diaphragm is made of a polypropylene polymer material with a corrugated rib structure.
Low-frequency playback at 37 Hz is achieved with aluminum voice coil bobbin and large magnet for high input resistance.

A 4.3 cm hard dome type skoker is mounted in the middle area.
The diaphragm is equipped with an aluminum alloy diaphragm with improved rigidity by special treatment of both sides.
In addition, the double suspension system prevents lateral vibration at large input, and uses a 100 mm diameter magnet to achieve high efficiency.

A 1.6 cm hard dome type tweeter using α -Boron diaphragm is mounted in the high range.
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.

A level control is provided for the high-frequency band.

A rigid particle board is used for the enclosure.

Model Rating

Method	3-Way, 3-Speaker, Bass reflex system, Bookshelf Type
Units Used	For low band : 22 cm cone type For Middle Area : 4.3 cm Dome Type For high-pass : 1.6 cm dome type
Playback frequency band	37 Hz to 65 kHz
Maximum allowable input	110W (program source)
Input impedance	6 Ω
Average output sound pressure level	91dB/W/m
Crossover frequency	1.5 kHz, 8 kHz
Level control	High frequency continuously variable
External dimensions	Width 297x Height 525x Depth 252 mm
Weight	11.5kg