First of all, I checked this unit for noise issues. I connected it to a 100% balanced audio path via the XLR jacks, set the gain to my normal levels, then began manipulating the faders at the +/- 12 dB scale. No hiss, nada. The EQ was perfectly quiet.
My dbx 231s replaced an ancient dual-15-band Samson EQ which obviously wasn't giving me enough control in my desktop system. Thus far, I really like the results.