PreSonus ERIS SUB 8BT Compact Active Studio Subwoofer with Bluetooth® Connectivity - 8"The best subwoofer you can get to put a little boom in your room, the surprisingly loud, 100 watt Eris Sub 8BT reaches down to a molar rattling 30 Hz, so youll hear the full sonic spectrum and produce better mixes. The first PreSonus studio subwoofer to offer Bluetooth 5. 0 wireless connectivity, the Eris Sub 8BT provides flexible wired connection options, as well, making it easy to add a subwoofer to just about any monitoring setup. Onboard controls