This is a collection of AR-LST literature reproductions. The first item is a two side brochure on heavy bond paper depicting the AR-LST at the Royal Opera House along with specs. and response curves on the rear. The second item is an eight page booklet  describing this incredible speaker system in detail.  Included is a set of 16 response curves depicting the system in a variety of conditions. A schematic of the wiring and the network swtching in also included.

•  If you should own this system, consider yourself very lucky. The AR Laboratory Standard Transducer was designed for those laboratory and commercial applications that required conveniently repeatable, accurrately known spectral energy profiles, including one flat profile extending from 30 Hz to 20 kHz. The LST utilized a total of nine speakers all from the AR-3a design, along with an autotransformer for level adjustment/balance. This system could handle 180 watts for a short term.  

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