The SOS certainly seems interesting. The web page reads like it is essentially a single-band parametric equalizer with an automatic calibration capability -- sort of like YPAO/MCACC specifically for the LFE channel. But I really don't understand the description of the "Analog Signal Processing (ASP) technology." So, does the unit function as an analog parametric filter once it is calibrated??? I don't know how it digitally control the analog circuitry, especially with the digital portion of the unit's circuitry turned off once the calibration is complete.