SP2600-EQAS and SP2800-EQAS contain frequency divider and two amplifiers. One manage high frequency output and the other manage low frequency output. Both frequency and volume can be adjusted. It has a voltage transfer switch, which can adapt to different voltages, and a Link output, which can connect more devices. There is also a Link output to connect more devices.
SP2600-EQBS and SP2800-EQBS built-in crossover is specially designed for subwoofer, with high power. Both frequency and volume can be adjusted. It has a voltage transfer switch, which can adapt to different voltages, and a Link output, which can connect more devices. There is also a Link output to connect more devices.