Hi, I am running my audio system from a HTPC. I have an unlimited band Parametric Eq software (which uses fir filters and not IIR filters, so you can use it also with the main speakers and not only with the subwoofer). I would like to use this software in order to apply room correction for my listening spot, but only below 200hz (maybe even lower). The question is this: what is the best process to do it ?. Should I calibrate both speakers at the same time (using the same signal) ?, or, should I calibrate each speaker individually ?. I know that when it comes to professional RCS systems, they calibrate each speaker individually (since high frequencies are involved, meaning, both speakers won't play it at the same time). OTOH, I know that regarding dual subwoofers, the notion is that you need to calibrate them together at the same time (using the same signal) because in real life they will be playing the same signal at the same time (since low frequencies are non directional). So, what do you think I should do in my situation ?.