The ART CLEANBox Pro is a professional dual-channel level converter designed to solve common audio interface problems in live sound, studio, and installation applications. Its primary function is to convert unbalanced, high-impedance line-level signals—such as those from consumer audio devices, DJ mixers, or keyboards—into balanced, low-impedance signals suitable for professional microphone preamps, mixing consoles, and recording interfaces, and vice-versa. This conversion is critical for preventing hum, buzz, and radio frequency interference (RFI) that often occurs when connecting consumer gear to professional systems over long cable runs. The CLEANBox Pro provides galvanic isolation between its input and output circuits using premium audio transformers, which effectively breaks ground loops, the most common cause of system noise.

Each of the two independent channels features both unbalanced 1/4" TS and RCA inputs and balanced XLR and 1/4" TRS outputs, offering maximum connectivity flexibility. The unit can operate in two modes: as a direct interface ("DIRECT") for simple level matching, or with the ground-lift isolation transformers engaged ("ISO") to eliminate ground loop noise. It includes a ground lift switch per channel and a polarity reverse switch to correct phase issues. Built with high-quality components and housed in a rugged steel casing, the CLEANBox Pro is designed for reliability on tour and in permanent installations. It can be powered via an included AC adapter or phantom power from a mixing console, adding to its versatility for stage and mobile use.

By providing clean, transparent signal conversion with built-in isolation, the CLEANBox Pro is an essential troubleshooting tool and a permanent signal-conditioning solution for audio engineers. It ensures that signals from any source integrate flawlessly into a professional audio system with optimal level, impedance matching, and noise-free performance.