Ovoidal 4.1 is a long excursion bass reflex subwoofer in an ovoidal axisymmetric closed structure, characterized by extreme sensitivity, dynamics, and emission power, made with an incredibly rigid and light structure in durable composite materials. Unlike all other alternatives currently available, this low-frequency speaker was made without technical and dimensional compromises, with structural technologies not present in the professional audio market. Thus it achieves maximum acoustic performance with an elegant design and a unique personality. All other bass reflex subwoofers on the professional audio market are built inside wooden box structures. This technology is flowed due to structural resonances and internal acoustic problems related to stationary waves. Furthermore, the wooden structure is very heavy and is characterized by problems related to protection and durability, with little resistance to atmospheric agents. Ovoidal 4.1 represents an exclusive technological innovation, built from high-quality composite materials in a special ovoidal shell shape. The scratch-resistant glossy surfaces and the resistance to atmospheric agents, combined with great power with extremely high efficiency and very high sensitivity, allow Ovoidal 4.1 to truly distinguish itself when compared to any product from the main competing brands, with direct radiation electroacoustic bass reflex technology. Ovoidal 4.1 guarantees the perfect loading of low frequencies in sensitivity, depth, control, and SPL expressed by the usage of few watts. Ovoidal 4.1 uses a single hi-quality transducer of 15“(380mm). The structure is rigid and very light (considering the overall weight and the dB/Kg ratio). The aesthetic impact is extraordinary and unique in the professional sound market.