1949 ALTEC 400B 8-in Dia-Cone Speaker Ad

AMERICAN AIRLINES CHOOSES ALTEC LANSING 8″ SPEAKERS FOR FAMOUS FLEET OF DC-6s


Click on image above to see full size version

After exhaustive competitive in-flight operating tests of Altec Lansing and other speakers, American Airlines’ communications division engineers reported: “Observers all voted for the Altec system on the basis of quality and clearness.” Entire passenger fleet of DC-6’s will be Altec Lansing 8″ 400B Dia-cone equipped.