Please ask question if interested. 8 Mid woofer Replaced with new match. I retained the original Mids. Walnut Veneer in very good condition. Extremely clear an precise mids & Highs. Note: Grills are frayed & tears, inexpensive do it yourself project. The Acoustic Research AR90 is a floor loudspeaker system known for its high precision and quality performance. Here are some of its key features. Type : 4-way, 5 driver loudspeaker system1. Frequency Response : 23Hz to 30kHz1. Recommended Amplifier : 50 to 300W1. Crossover Frequency : 200, 1200, 7000Hz1. Bass : 2 x 250mm acoustic suspension1. Midbass : 1 x 200mm acoustic suspension1. Midrange : 1 x 38mm hemispherical dome1. Tweeter : 1 x 19mm hemispherical dome1. Dimensions : 1102 x 368 x 386mm1. Weight : 37kg each, 74kg pair1. The AR90 speakers are designed with an Acoustic Blanket and a vertical, upper-range driver array for precise imaging and localization. Additionally, the positioning of the two woofers, one on each side of the enclosure, ensures a flat frequency response, especially at the lowest music frequencies1. These speakers are considered to be very high precision devices, comparable to professional studio microphones, and they may reveal limitations in associated equipment due to their clarity1. It’s recommended to use them with a stable, high current amplifier due to their impedance and sensitivity.