Horn loading of its drive units has been a mainstay of Lowther's designs from the very earliest days. In the post war years, with raw materials limited, it must have been difficult making larger speaker cabinets. So it was that the TP1 and Acousta models were introduced. Unveiled in the 1950s, these measured 34×18×17in (hwd) and were available in either vertical or horizontal mountings. The horizontal version came with 12in legs and is rare to find nowadays.
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