This series of state-of-the-art subwoofers continues to enhance Peerless's reputation for delivering the highest quality components for bass. Called the XLS—for "Extra Long Stroke"—these audio transducers add more excursion while eliminating distortion. The XLS line features a strong yet attractive cast frame, Nomex cone, flat spider, and generous under-spider venting. The magnet system incorporates multiple distortion-canceling fixtures.