ART TUBEMPPSU Tube PreamplifierThe Tube MP Project Series stands as a professional grade audio interface facilitating the connection of microphone, instrument, and line level signals to mixers or other audio inputs. ART meticulously updated every aspect of the design, both internally and externally, while preserving the compact, reliable, and cost effective nature of the product. From the redesigned all aluminum stackable chassis to the enhanced precision LED level metering