Why would that be bad? I your headphones has minor problems in a few frequency ranges a 3-4db EQs are all you need to get it to the desired sound signature, i myself got a 3,4db bass boost and a 3,6db 2khz boost on my 800S, it doesn't make a huge difference but it makes them fit my preferences more closely without completely chanign the sound signature, if you do it in the right way and tastefully i don't see a problem with this