I knew this filter would be good because it's basically a dual version of the filter on the ADDAC 4-Voice Cluster, as I understand it -- which is a great sounding little filter. Can be used dual mono or stereo, with true, tight high pass (I notice a lot of non-premium filters really phone in the HP or have noise leak, but not this one) and band pass, and a lovely, crisp, acid-y sounding low pass. I have an SSF Stereo Dipole and it took me quite a bit of patient tweaking with it to replicate the slick, crisp LP I was getting out of the ADDAC604. It seems to have a bit of inherent drive/saturation -- not enough to distort, just enough to keep the output warm and full-bodied. This was part of what was tough to match on the Dipole -- that and the excellent crispness of the mid-to-mid-high region at moderate resonance. Eventually I did match it (the Dipole is a very advanced and capable filter) but it took some work to get the same sound source sounding as good as it did through this modest little monster. Highly recommended if you want a stereo option without breaking the bank or using a lot of HP. Given its compact size there are of course some compromises, the main ones being limited modulation options (2 FMs only, 1 per channel/side) and wobbly trimmer pots instead of proper solid knobs. But there are no compromises sound-wise, it is a great sounding filter. Also, it is worth noting that this is completely different than the ADDAC702 Dual Filter -- it's not a "mini" version of that one. I have both and they are totally different from each other (and both great in their way). In fact in terms of just a straight-forward great sound for general use, this is probably the superior of the two; but in terms of flexibility and creative modulation options, the 702 obviously has more to offer there.