The 4S loudspeaker is a compact passive two-way system engineered for high-quality audio performance in both fixed installations and distributed sound applications. Designed to support discreet integration, the 4S features a 4-inch neodymium low-frequency driver with a coaxially mounted wide-dispersion dome tweeter, providing precise sound reproduction with symmetrical coverage across horizontal and vertical planes. This design ensures consistent listening experiences in a range of acoustic environments, making it well suited to hospitality venues, corporate spaces, galleries, and public areas requiring unobtrusive yet reliable sound reinforcement. Housed in a sealed, injection-moulded enclosure with an IP34 rating, the 4S is built to endure varying environmental conditions, while its compact form factor allows for flexible mounting in either orientation. It can be deployed as a standalone solution or combined with subwoofers from the xS-Series for extended low-frequency support. The 4S loudspeaker is equipped with practical rear connectivity options including NL4 connectors, a screw terminal block, and M8 threaded inserts for secure installation. It is available in standard black or white finishes, with the additional option of custom RAL colours under the Special Colour variant. With its refined design and dependable acoustic performance, the 4S loudspeaker supports integrators and installers in achieving consistent sound quality within architecturally sensitive or space-constrained environments.