The whole thing about these filters is that you CAN'T control the Q...and in this case that is a good thing, The Q is not adjustable because it uses the ideal slope for the cleanest results (i.e. "anti-crush" technology"). I rarely use this plug for the high cut on a mix buss due to its softening effect, but for individual tracks it's a go-to. Brainworx themselves admit that "anticrush" is basically a buzzword, but that word contains real buzz... i.e. if you want the cleanest possible slope for a low or a high cut, use this.