You set up the crossover frequency, the sub level and the required delay manually. Room correction doesn't tackle these settings.I like many others I'm sure, will be taking their first steps into room correction using an iPhone,and the new Wiim app. My question is, do I manually set the frequency of the crossover and volume on my subwoofer on my 2.1 system , and then run room correction, or does the it work it out itself ? Very confused, many thanks