COLLECTORS EDITION IN ORIGINAL FACTORY BOXES. VINTAGE Acoustic Research AR3a Speakers (2). Oiled Walnut Cabinet — Original Finish — No visible scratches anywhere. Original Label on back s/n # 11499 and s/n# 13955. All Original Manuals and Registration Card. Slight blemish / imperfection in walnut veneer (bottom edge and back corner of Speaker A). All items are original including, cabinet and finish, speakers and pots (AR3a badges are new replacements). Both units tested Nov 2022 — beautiful sound and dynamic range. S/N 3A 11499 – no audible issues on hi-frequency pot; some dead-spots on mid-range pot. S/N 3A 13955 – no audible issues on hi-frequency and mid-range pot. All Sales Final — As Is, Where Is. The AR-3a was the best speaker system Acoustic Research ever made — 50 years ago! It has been designed to reproduce music as accurately as present-day knowledge of. Acoustics and electronics permits. In addition to incorporating the 12-Inch bass. Driver with which AR introduced its acoustic suspension systems to home listeners. The AR-3a is the first speaker system to use two miniature hemispherical speakers. Developed by AR to give better mid-range and high frequency response. Miniature speakers offer an unprecedented degree of accuracy In their respective. Size: 14″ x 25″ x 11 3/8 deep. Weight: 53 1bs (24 kg). Recommended Amplifier Power: 25 watts. RMS per channel, minimum. Speaker Complement: 12 acoustic suspension woofer. 1 1/2″ mid-range hemispherical dome, 3/4″ high-frequency hemispherical dome. Controls: Independent mid-range and high frequency driver level controls. A technical data sheet and sound tests are available. An innovation in its time — featured in listening room of Lincoln Center Library and Museum of the Performing Arts in New York City, and on permanent display in the Information Age Exhibit of National Museum of American History at The Smithsonian Institution in Washington, DC. All items are Vintage Old Stock in factory original protective boxes. Please ask any questions before ordering. YOUR Satisfaction is our #1 Priority! We aim to make you happy if you give us a fair chance. International orders: B.