ACG EQ-02 5-knob version. These things sound great, but it's just not doing it for me. Controls are Volume, Blend, High Pass Filter (stacked), Low Pass Filter (stacked), and passive tone. Check out HERE for a full description on this super powerful tone shaping tool. Ships in original box with stereo output jack, batter clip, and Sadowsky style "Black Aluminum" knobs from Best Bass Gear, about a $50 value in themselves. I did have to reuse my existing jack, and de-soldered the jack the preamp came with, but it's included. My first choice would be to trade for a 5-knob Aguilar OBP-3, but I'll also sell for: $200 shipped in Canada $220 shipped to USA Thanks for looking!