Got a request for the DI portion of the Hartke LH1000 bass amp. This is more or less that, but with a simplified power section. In the amp this runs off a bipolar 15 volt supply, but I would think it would also work with regular 9 volt supply. There's not an unbalanced output, but if you need to add that you can probably add it off pin 3 of the XLR. Schematic for reference.