In looking at the options it appears that the biggest drawback to the SMS-1 is that it does not truly process stereo subs. It nulls them to one signal. Thus for true stereo bass you would need 2 units. The SVS AS-EQ1 does allow for stereo, but also has a 7.5 ms electrical latency which requires either placing your subs 8.4 feet closer to the listening position than the mains, or purchasing a digital cross-over to compensate for the delay. There does not seem to be a single solution for DREQ of the subs. Is any one aware of any others? I have truly full range speakers with their own powered Low frequency Modules.