7040A Active Subwoofer. A great subwoofer is about so much more than just delivering ‘more bass’. The laminar spiral design of the 7040A ensures that it can deliver high SPL performance that is precise, articulate and free from distortion, right down to 30 Hz. So when partnered with our 8010 or 8020 nearfield monitors, the 7040A creates a full-range system that is completely seamless. It just sounds ‘right’.