Transcription of 一級品のラウドスピーカー アルテック 604
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Vacume Tube Valley . Charles Kittleson, VTM Editor . 604 1943 .. 604 (Duplex) .. 604C .. 604C. 30 22,000 . 50.. 604C . 604C.. 604C .. 12 . 601A 15 602A .. 1.. 1930 ( ) . (Iconic) .. (High Fidelity) .. ( ) .. 8,000 1940 . McMurdo Silver, ,Zeni . th Scratpsphere . J . ensen Q .. (Coaxial) . (James Lansing) 1920 . 1937 1940 . 15 15 JHP- .. WE . (All Technical Services) . 1920 1930 . Electorical Research Products Incorporated (Altec) . 1940 . 1938 . WE . 2. 1941 (John (Television Engineers trade show) 1943 10 . Hillard) (James Lansing) .. (105 dB/watt) 1,000 DC . ( ) . ( ) .. (Society of Motion Picture) .. 1945 (ALNICO 5) .. ( ) . 25 RMS 50 15,000 . ( . 1. A ) (Rolled Paper Surround) . ( ) .. 20 1,000 1945-1948 .. ID ( ) . 1948 . 1960 - ( ) . 1,000 . / / / .. 25 . 40 .. 60 .. 1 . 3.. 1952 . C 50,000 . ( ) 1,60 . 0 - 1957 . 1960 . 35 .. ID ( ) .. 4. 35 RMS 30 . 22,000 . ( ) 1958 12 / . 1964 .. 1965 1972 . (Super Duplex) 1,500 . ( ) 30 22,000.
50年代の604 放送局と レコーディ ングスタジ オの市場 が拡大して いくにつれ て、アルテ ックは1952 年に604c
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