Pioneer TS-SWX2502 Sealed enclosure with 10 TS-SW2502S4 subwoofer Feature: Sealed enclosure with one 10 TS-SW2502S4 subwoofer 5/8 medium density fiberboard construction covered with black carpet 4-ohm impedance Power handling: 300 watts nominal (1200 watts peak power) Frequency response: 20-200 Hz