This ground stack accessory is designed for audio professionals and enthusiasts who want to enhance their sound setup. It works with compatible Vertical Transporter carts to improve stability in ground stack configurations. The accessory features an outrigger system, four screw jacks for height adjustment, and an innovative spring-based angle-set mechanism. It has a compact and lightweight design, with dimensions of 239 mm x 1234 mm x 1105 mm (9.4 in x 48.6 in x 43.5 in) and a net weight of 25.6 kg (56.4 lbs). The GND is compatible with the VTX A12 VT and VTX B28 VT, and can support the weight of up to six A12 cabinets depending on the array geometry. Ground stack parameters and mechanical safety of arrays are calculated using JBL's LAC-3 software.