The V-GSUB is a professional-grade cardioid subwoofer engineered for accurate and controlled low-frequency reinforcement in ground-stacked sound reinforcement systems. Designed for use in performance venues, touring applications, and fixed installations where directional low-end control is critical, the V-GSUB delivers reliable performance driven by a single amplifier channel. Its construction features an 18-inch neodymium driver in a front-facing bass-reflex design and a 12-inch neodymium driver in a rear-facing two-chamber bandpass configuration. This driver arrangement creates a cardioid dispersion pattern, significantly reducing unwanted energy behind the cabinet and improving clarity in reverberant environments. The V-GSUB aligns with the acoustic characteristics of the d&b V-Series, sharing a visual and sonic design with the V-SUB but optimised specifically for ground-stack deployment. Its robust enclosure is constructed from marine-grade plywood with a weather-resistant PCP finish, making it suitable for a range of demanding environments. The top panel is recessed to accommodate V7P or V10P loudspeakers, allowing secure stacking and stable deployment. Designed with practical handling in mind, the V-GSUB also features side-mounted handles, protective base runners, and an integrated M20 flange for pole mounting. The V-GSUB is a reliable solution for sound engineers and integrators seeking precise low-frequency management within high-performance audio systems.