Seymour Duncan STC-3A preamp - $65 This is the 3 band model with "slap contour switch" for active pickups. This was pulled from a Ken Lawrence bass after about 1/2 a year and is missing the pan pot and I don't have a schematic. Other than that it's fine. Warmoth has it for $123 so I'm thinking $65 shipped to the 48 states. Trades are always amusing, but I never know what I want till I hear it so throw something out there. Here's the description from the Seymour Duncan site http://www.seymourduncan.com/website/products/bassesdescr.shtml#ToneCircuitsOnBoardEQforBass Tone Circuits On-Board E.Q. for Bass STC-2/STC-3/STC-MM -- This system provides either two or three focused bands of EQ together with a master volume, blend, and a proprietary slap contour which, with the flick of a switch, delivers a focused bottom, contoured mids and transient highs with a lot of air. It's great for instantly changing from slap to fingerstyle without compromising tone. The bass control brings up the bottom end without being boomy or mushy; the mid control (3 band only) gives great cut without being honky; and the treble control is engineered to bring in a lot of presence without a lot of noise. The Tone Circuit for Music Man ® systems is essentially a 3-band unit for passive pickups without the blend control. STC-2 and 3 are available in models for use with active or passive pickups.