This listing is for a pair of Acoustic Research AR-4x speakers, a classic model from the United States. These vintage speakers are perfect for any collector or audiophile looking to add a touch of retro flair to their audio setup. The speakers come in a unit quantity of two and are in used condition, tested, working but may have the commonly known issues related to the adjustable frequency potentiometers. Cabinets have some scratches, they are 50 years old! These speakers were designed to deliver high-quality sound to your favorite music or audio recordings. I personally had a pair long ago and was able to turn my high end Denon receiver up to max volume with no distortion or damage to the speakers. I was absolutely amazed! The brand name says it all – Acoustic Research – and these speakers are a prime example of the company’s commitment to superior sound quality and design.