This four-vessel rapid-quench system offers a specialized capability for experiments requiring extremely fast quenching rates, crucial for preserving high-temperature phases, particularly in melt systems. Operating with water pressurization, the system can reach temperatures up to 950°C at 200 MPa (2 kbar) or 1050°C at 100 MPa (1 kbar). The rapid quench is achieved by quickly dropping the experimental capsule into a water-cooled sleeve at the conclusion of the experiment, providing quench rates of several hundred degrees Celsius per second. This feature is invaluable for melt experiments and mineral-melt partitioning studies, as it allows for the rapid vitrification of melts. The system also supports controlled decompression experiments, especially relevant for studies of magma degassing, by connecting to standard cold-seal vessels. Temperatures and pressures are continuously monitored and recorded for precise control and data acquisition.