(6 9) 38 It Puts the Talk in Talkies. THE S-M 690 Super-Power Amplifier Specially degigned for u8e in Picture Theatres, Footbal Groundg; Sports Stadiums, Race: courgee, Or wher; ever an amplifier 0f tremendous power 18 required in con junction with the highest quality re? production of voice and mugic This Bpecial am plifer operateg through three stages ~Wo of them power pubh-pall- and j8 acrerged for microphone radio Or Bingle Or dduble record input = work. It ba8 15,000 to 16,000_ milliwatte distortionlees power output: The S-M 690 Super-Power Amplifer j8 nOw: being uged in varioug Malkie" installationg throughout: New Zealand Coula you have better PROOB o1 Its capabilitieg: Its : a Silver-Marshall Product NS MASTER AGENTS BOND & BOND;LTD: AUCKLAND:
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https://paperspast.natlib.govt.nz/periodicals/RADREC19290816.2.44.1
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Radio Record, Volume III, Issue 5, 16 August 1929, Page 17
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119Page 17 Advertisement 1 Radio Record, Volume III, Issue 5, 16 August 1929, Page 17
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