<p>In response to the critical demand for high-power, very-low-frequency (VLF) sound sources in marine exploration and research, this study presents an innovative dual-magnet Electromagnetic Acoustic Transducer (EMAT) designed to significantly enhance low-frequency sound power. Traditional electromagnetic transducers have historically struggled to achieve high sound pressure levels (SPL) at frequencies below 50 Hz. To overcome this challenge, we optimized the magnetic circuit architecture of the transducer, leading to a substantial amplification of SPL at the lowest frequencies while preserving a compact design. Our approach involves the introduction of a novel planar, series-connected dual magnetic circuit. The geometric parameters of this circuit were meticulously optimized through a sophisticated integration of evolutionary algorithms and finite element analysis (FEA). The resulting finite element model of the EMAT demonstrates exceptional magnetic induction intensity, achieving an approximate 4-dB increase in output SPL compared to conventional magnetic circuit designs. By leveraging FEA, we have successfully engineered and refined this advanced magnetic circuit structure, resulting in a notable enhancement of SPL at the lowest frequencies. This optimized design not only addresses the limitations of traditional transducers but also provides a superior, high-performance solution for generating high-power, ultra-low-frequency acoustic emissions, thereby effectively supporting marine engineering projects and scientific research endeavors.</p>