Essentially, it’s a box with the job of grounding the housings and bases of devices. The GroundBox made by Subbase Audio offers 12 outlets with banana jacks and is cut from solid aluminum. Inside, potential currents connected to the device are grounded, a process that nearly eliminates them entirely. You can really notice this on housings. Also for component bases, absorbed electrical and electromagnetic fields are redirected faster, reducing storage effects in the process.