Vintage Acoustic Research AR18S HiFi Speakers - 60 W + Box In full working order with new rubber surrounds. - see pictures-The speaker surrounds are made of high-quality rubber, pliable and durable. The mid-range, high range and the bass are wonderful, bass is deep, tight and controlled, although very powerful. One of the best little speaker ever. Over 300 pairs of Acoustic Research Speakers restored and sold. The feedback received for these speakers will best describe them.Exactly as described, great neutral sound and excellent value for money. Probably need to spend well over a grand to get a modern equivalent. Just need to get a decent DAC now.Very nice speakers expertly packed by the seller.Excellent speakers. Incredible for age. Restored & packed well. Mr. Edgar Villchur, the founder of the original Acoustic Research Company invented the acoustic suspension (infinite baffle) principle in 1953, just as they invented the dome speaker. What AR had always been famous for was the neutrality of sound. A good speaker was good with everything and anything, either you play rock or classical music they deliver amazing sound. There is some grain of truth in AR’s motto” High Fidelity’. System Type: Bookshelf acoustic suspension 2 -way system with drive units in vertical array. Drive units: 6 inch (150 mm) long throw acoustic suspension woofer. 1 inch (25 mm) liquid cooled dome high range driver.Sensitivity: 2.83 volts produce 87 dB SPL at 1 m on axis. Frequency response: 62 Hz – 20 kHz. Cabinet Internal volume: 9.89 l.Dimensions WHD: 256 x 410 x 165 mm. Weight: 6.6 Kg each speaker.