Magnepan is the most successful manufacturer of full-range dipole loudspeakers in the world. Nearly 200,000 of these speakers have been purchased by audiophiles ... audiophiles such as those taking part in the last speaker survey conducted by Stereophile magazine which revealed more of their readers owned Magneplanars than any other brand, and 99% were satisfied with their purchase. Description 2-Way / Quasi-Ribbon Planar-Magnetic Freq. Resp. 50 - 24 kHz (+/-3 dB) Sensitivity 86dB / 500Hz / 2.83v Impedance 4 Ohm Dimensions 14.5 x 48 x 1.25 Available in natural or black solid oak trim with off-white, grey or black fabric.