High-power ultra compact subwoofer, 40hz LF limit, high power handling , low distortion and thermal compression, high-power ultra compact subwoofer. Progressive vent for increased peak SPL, and minimal turbulence nosie. The latest subwoofer design incorporates a vent with a progressive profile and ultra-low vibration walls for a significant gain in peak SPL, laminar airflow and drastic reduction of turbulence noise progressive vent for increased vent for increased peak SPL, and minimal turbulence noise.