Welcome to BIGEARS-AUDIO vintage audio specialists.. All equipment is tested and guaranteed.. Pair of vintage Acoustic Research AR-MST speakers…. They are the first variant with 4 tweeters. They will be double boxed, insured and sent worlwide. Thank you for looking. Get Images that Make Supersized Seem Small. Attention Sellers – Get Templates Image Hosting, Scheduling at Auctiva. Track Page Views With. Auctiva’s FREE Counter. The item “Pair of vintage Acoustic Research AR-MST speakers in good condition” is in sale since Saturday, July 01, 2017. This item is in the category “Sound & Vision\Home Audio & HiFi Separates\Speakers & Subwoofers”. The seller is “bigears-audio” and is located in Penzance. This item can be shipped worldwide.