There are a variety of parametric eq's that work well with Subs. Our PARC was designed for high end main speakers, but can be used for subs. In the summer we will release the PARC plus which is designed for use with HT set-ups including subs by adding 4 more channels of equalization. The whole concept of parametric eq for subs makes a lot of sense and a few companies already employ this technology into their subs. The better the sub the more likely it is to excite certain room modes, and the parametric eq can tune these out very effectively.
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