These are iconic speakers that have been used worldwide as near field studio monitors since their release in 1978. Acclaimed as a speaker that easily reveals poor quality and shortcomings in recordings. It features precision soft dome tweeter, professional left-right symmetrical design, all-wood finish, an efficient 90 dB sealed system. Key Specifications Speaker Type : 2-way bookshelf Frequency Response : 50 Hz - 20 kHz Power Handling Capacity : 25 W continuous, 50 W max Nominal Impedance : 8 ohms Sound Pressure Level : 90 dB Woofer : 7 inch 1/8 ounce, white, hand curled, folded, and glued, pressed pulp paper cone of imported wood processed in a special way for optimum response. The cone is a conical straight type to optimize movement. A large ferrite magnet produces a powerful magnetic circuit of 10,800 gauss. The voice coil is heat-resistant copper ribbon wire wound edgewise and a lightweight voice coil bobbin, increase efficiency and high input resistance Tweeter : 1-3/8" precision soft dome to maximizes dispersion and absorb harmful resonance from the diagram which is uniformly coated with a resilient heat-hardened resin by a special process to obtain the ideal combination of softness and durability to produce a natural tone qiality with negligible distortion. A large ferrite magnet is used to produce a strong magnetic field of 14,000 gauss, which together with the 1-3/64" voice coil incorporates heat-resistant copper-clad aluminum wire and a lightweight bobbin. The outer pole piece uses air holes to allow air to enter and leave for smooth movement of the diaphragm. Crossover Frequency : 2 kHz (12 dB/oct) Cabinet : real wood, black finish Dimensions (W x H x D) : 15"x 8-1/2"x7-7/8" Weight : 13 lbs 3 oz