The Infinity Reference 1220se is a Single 12-inch Preloaded Enclosure with a Slipstream Port. The Slipstream port delivers higher output potential than conventional ports and greatly reduces distortion. This gives you louder, cleaner bass. The power handling on this enclosure is 300 Watts RMS with peaks of 1200 Watts. Infinity Systems is a leader in loudspeaker design for both car and home speaker systems and is part of Harman International.