An external powered subwoofer can connect to a ZVOX as long as it has a Subwoofer Output, Line Out, or Headphone jack. The powered subwoofer would need to have an internal crossover selector, also called a low-pass filter, for filtering out the mid and high frequencies. This is because these output jacks on the ZVOX are full-range audio outputs.
If you have questions about subwoofer connections, please email us at info@zvoxaudio.com or submit a new support ticket for additional assistance.