Sound output has been confirmed; however, age-related deterioration is present, including remaining crackling noise especially from the attenuators. The speakers were previously professionally cleaned, but full restoration has not been completed. There is a corner chip and protective tape applied around front connections. Overall condition reflects heavy vintage use. Main Specifications: Brand: Acoustic Research Model: AR-3a Type: 3-Way Passive Speakers Acoustic Research AR-3a 3-way speaker system Oiled walnut cabinet finish Vintage audiophile reference model (circa 1973) Pair set (left and right speakers included) Passive bookshelf/stand-mount speakers Impedance/power details not specified A rare opportunity to own one of the most iconic vintage speakers in audio history. Ideal for restoration, collectors, or vintage hi-fi enthusiasts. If that, please let us know within 3 days you got the item.