The MB Quart QL 100 M is a model from the QL series, designed primarily for marine audio applications. It features a durable build suitable for use in harsh environmental conditions, such as exposure to water and UV rays. The speaker system typically includes a coaxial design, integrating a woofer and a tweeter, which allows for a wider frequency response and improved sound dispersion. The QL 100 M is aimed at providing clear and powerful audio output, suitable for outdoor use while ensuring good performance even in noisy conditions. Often characterized by a robust construction, the materials used in the QL 100 M are chosen to resist corrosion and deterioration over time, enhancing longevity.