Subwoofer EQ? in Home Theater Posted March 14, 2019 You definitely want a measurement mic and then you download freeware REW which takes the measurements and is pretty easy. I use several amps for mains, mbms and subs. They all have peq capability which i find to help in all cases. But the sub eq is critical and really the key element to fixing room issues. Even if you dont use peq, the crossovers, delay, gain, dynamic eq and other functions all have some potential benefit. A minidsp for the subs is a great start.