I have a used OBP-3 for sale that I took out of a bass recently. I bought it new from bestbassgear.com a few months ago. I took it out because I decided to go with an all bartolini setup. It comes with a jack (never used) and the mid selector switch. I'm sorry but I don't have a set of pots I can give you. I have a few on hand but a couple might be scratchy (but you're welcome to them) Anyway, if this is to be a replacement preamp, you can use the pots already in your bass at least. Here's one picture of it in the bass. Of course, more pics upon request. It's got killer flexibility and is an easy install with the clear wiring instructions. $85 + shipping.