Klipsch P-37F. Tweeter size: 19 mm (0.75 "), Mid-range driver size: 114.3 mm (4.5 "), Woofer size: 177.8 mm (7 "). RMS rated power: 275 W, Peak Music Power Output (PMPO): 1100 W, Frequency range: 43 - 24000 Hz. Width: 248 mm, Depth: 495 mm, Height: 1181 mm. Type: Floor-standing speakers, Depth: 495.3 mm (19.5 "), Height: 1181.1 mm (46.5 ")