'Amplifiers and preamplifiers', Harpers
Tags: 1950s; 1955; 1955-6-1; Audio amplifiers; Boyd Neel String Orchestra; Canby, Edward Tatnall; Dame Sitwell; Edith; Engineering; English Opera Group Ensemble; High-fidelity systems; John Ireland; Performances; Peter Pears; Peter Warlock; Phonograph; Reviews; Sound recordings; Telecommunications; United States; William Walton
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