Works very well but I wish it allowed to boost above 12db. I like to keep the preamp and volume low but I like that deep bass rumble while I'm working. Since it doesn't allow boosting above +12dB, I have to raise the volume a bit which distracts me while I'm working. Maybe the developer can add a pro mode with a warning that allows to boost above +12dB maybe upto 16-20dB atleast.