This is a Clone of the Noble Bass Preamp, by Conspiracy to Commit Electronics (aka SushiBox) and it's a gorgeous sounding preamp (transparent, smooth eq and touch sensitive). Built with high quality components (Black anodized aluminum knobs, Lumberg DC& 1/4" jacks,, WIMA capacitors & JENSEN transformer for the DI). It also has two NOS made in USA GE 5814's (high grade, low noise 12AU7's) in it (no imported tubes). It uses a standard 9 volt center negative power supply but runs the tubes at high voltage with an internal power supply to run the tubes drawing 507ma when fully warmed up, (so DO NOT use a power supply higher than 9 volts!)
Input, output and DC power are on the top with a transformer output for the XLR direct out with a ground lift switch on the left side. The blue trimpot inside adjusts the level of the DI.
With Noble preamps selling for $2K these days, this preamp is an absolute bargain.