Klipsch R-800F - Reference FloorStanding Speaker Pair BlackKlipsch R 800F Floorstanding speaker pair ALL NEW 90 X 90 TRACTRIX HORN An updated horn design, including increased outer horn dimensions, will deliver more power and emotion to your music and movies. Bigger definitely means better, with directivity control over a larger bandwidth of frequencies, resulting in a more accurate sound stage. REAR TRACTRIX PORT The rear Tractrix port is perfectly matched to the cabinet and woofers, creating ideal airflow