PASSIVE RADIATOR
Passive radiator technology can be simply understood as having a passive woofer unit, along with the main active driver that does most of the work. This way, the internal air pressure generated by the active driver is used to move the passive radiator in order to reproduce lower frequencies than standard speakers with similar dimensions.
Also, the reason you don't usually see this kind of technology in smaller pro-audio systems is mainly because of cost and engineering concerns. Passive radiators are more expensive and not so easy to precisely tune them.
Another advantage of our passive radiator is the complete elimination of all audible noise related to air turbulences, as there are no reflex tubes involved with this design. Unwanted pipe resonances (at multiples of half the fundamental wavelength), which are unavoidable with two-sided pipe openings, are eliminated this way.
We've also built a custom suspension for the passive radiator, which exerts a restoring force underneath its tuning frequency, thereby reducing inaudible excursions of the speaker into the subsonic range. This results in reduced intermodulation distortion in the audible spectrum.
In short, thanks to the passive radiator technology being used (and a few more engineering secrets, of course), the SC203 works and behaves as a fully fledged full- range speaker, with precise bass reproduction and a very small footprint.
A passive radiator – which you could simply think of as a passive speaker that moves through the force of air – located at the backside of the SC203, reinforces the reproduction of low frequencies and allows the speaker response to go down as low as an impressive 62Hz (-3dB) with very low distortion.
Each SC203 setup is configured as a 2-way master-slave system, and features four power amplifiers. Each woofer and tweeter gets its own dedicated 30W PWM amplifier with separate filter section for precise control. And for optimal connectivity, the SC203 houses three inputs – analog RCA, digital optical and USB – which will allow you to conveniently connect a wide range of sources. Furthermore, a volume controlled subwoofer output lets you connect an additional subwoofer (TS107 und TS108) to the master speaker and create a powerful 2.1 system. A DIP switch located at the speaker's back panel allows you to select the SC203's to work as "satellites" from 80Hz and upwards, or as a full range units.