Acoustic Research (AR) Classic 18 (SRA) 3 Ways Tower Speakers -Pro Reconditioned. This is a very rare and highly collectible Speakers… Recently recondition by a professional. The speaker cabinets were cleaned, polished and conditioned with wood conditioner (Hand Rubbed) however there are some nicks /blemishes from age and during moves. Also has minor veneer peeling on the bottom of one speaker.. See actual pic (pics are part of the description) for your assessment. The Grills were in great condition but were also cleaned. AR Classic 18 are highly rated and considered as one of the best vintage speakers in the market today. Very solid and highly collectible. Awesome deal for listed price. Here are some information that I found online.. Acoustic Research Classic 18 SRA Stereo Speakers. The Acoustic Research Classic SRA Series is one of those super rare systems that few folks have ever seen, with even less being available on-line in the way of reference material! For those who are not aware, the Classic series was the last line of speakers Acoustic Research was produced in. Acoustic Research Classic 18. Technical Overview: Classic SRA Series speakers systems are all build around one of ARs core technology modules, called the Symmetrical Radiation Array (SRA). The SRA consists of one 1 Soft-dome Tweeter, two Poly Midranges Drivers and the Poly Bass Driver. Apart from the bass driver size, the SRA is identical in all Classic systems, from the 18 to the 30. What the designers were seeking was controlled, uniform dispersion within a moderately wide listening window. This topology creates a virtual point source; all sound appears to emanate from one point or acoustic center. The enclosures that house all this technology are designed to be as inert as possible. Trapezoidal in footprint, and with a sloping top, the cabinets are heavily braced internally and are finished in high quality real wood veneers. The trapezoidal shape helps to reduce standing waves within the enclosure and provide increased rigidity. The front panel is as slim as possible for any given drive unit size and is heavily reinforced. This is to reduce early reflections in the mid to high frequency domain. Nominal Impedance: 4 ohm. Drivers: 8″ Poly Woofer, Two 5 ¼” Poly Midranges & 1 Soft Dome Tweeter. Height is 35 ½. See our other auctions for more deals. Item will be carefully packaged in a double walled box and insured for the full sale value. Get images that make Supersized seem small. Tailor your auctions with Auctiva’s. Track Page Views With. Auctiva’s FREE Counter. The item “Acoustic Research (AR) Classic 18 (SRA) 3 Ways Tower Speakers -Pro Reconditioned” is in sale since Tuesday, January 14, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Speakers”. The seller is “household_consignments_and_thrift” and is located in Roswell, Georgia. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.