The DS-18 direct-firing low-frequency professional speaker boasts excellent transient response and deep, rich low-frequency performance. Its construction process has been specially designed and developed. The reinforced enclosure suppresses low-frequency resonances, enhancing low-frequency output. The low-frequency driver employs a convection-based heat dissipation system, allowing it to handle higher power levels. The electroacoustic conversion efficiency is improved, ensuring reliability during prolonged continuous operation. The DS-18 subwoofer is used to expand or enhance the low-frequency driver. The voice coil is a (100mm) heat-resistant voice coil with strong mid-range low-frequency impact and increased bass output.