Vintage Acoustic Research AR-4X Bookshelf Speaker. Oiled Walnut Finish 1965 – 1966. With original Burlap Screen in beautiful condition, no tears. Many audiophiles consider this one of the best small speakers ever invented. Feel free to inquire for more photos or ask any questions you may have. Suitable for the amplifier beyond 15W. 10 x 19 x 9 in.