We had a chance to preview the Cadillac of ABIT's offerings, the SP-50. Take a look at our early impressions. All of ABIT's ABIT Audio System line are 5.1 surround sound systems. As opposed to the simple two speaker stereos that many of us are used to, 5.1 surround sound systems have six speakers. The film industry is responsible for the 5.1 format, which explains some of its characteristics as we will see.
Longer wavelengths mean lower frequencies which are produced by woofers.
By putting the large bass drivers into a single big, separate box, the other speakers can be made much, much smaller without greatly compromising overall sound quality. When first listening to such a system, it is common to experience the aural illusion that the heavy bass notes are actually emanating from the smaller speakers. Accordingly, a 5.1 recording must be made with at least five microphones - the subwoofer signal can be derived from the other channels. Of the five remaining speakers, one is reserved for the center channel. The center channel speaker helps tie sounds that occur on screen to the viewing area.