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Altec 604 Duplex LoudspeakerOriginal Altec 604 Sales Literature, Page 1Cutaway View Of Altec 604 Duplex LoudspeakerComparison of the different horns used in the Altec 604 and 604B and the one used in the 604C-GAltec 605A Advertisement, 1959Altec 604E SuperDuplex Specification Sheet, Page 1Altec Lansing 604-8K Duplex LoudspeakerCurrent version of the Altec 604
DUPLEX was the trade name given by Altec Lansing to its line of coaxial loudspeakers, beginning with the first model 601 in 1943. However, the name was most commonly associated with the subsequent model 604 which was a seminal loudspeaker that became a milestone in loudspeaker development. Well over a dozen different models carried the Duplex name over a near 50-year period. The vast majority consisted of a high frequency (HF) compression driver mounted to the back of a large diameter (12–15 in) paper cone low frequency (LF) driver. However, there were also a few models with small diameter LF cones and direct radiator tweeters.
The Duplex speakers were extremely versatile with the 604 model alone finding application in studio monitoring, home high fidelity, public address, tour sound reinforcement, cinema sound and installed sound. A number of duplex drivers were developed for very specialized applications, such as ceiling speakers. Some of the more significant models in the Duplex lineup were, in order of introduction, the 15" 601, 15" 604, 15" 602, 12" 601, 15" 605, 15" 904 and 12" 920.
The significance of the Duplex loudspeakers is evidenced by the fact that the Altec Lansing 604 Duplex was inducted into the TECnology Hall of Fame in 2005.[1]
^"1944 Altec Lansing 604 Duplex Speaker". Mix. September 1, 2006. Archived from the original on 2013-01-18. Retrieved June 26, 2013.
and 8 Related for: Altec Lansing Duplex information
DUPLEX was the trade name given by AltecLansing to its line of coaxial loudspeakers, beginning with the first model 601 in 1943. However, the name was...
AltecLansing, Inc. is an American audio electronics company founded in 1927. Their primary products are loudspeakers and associated audio electronics...
of the AltecLansingDuplex 601 coaxial driver, recording studio monitors have often been coaxial loudspeaker designs. In 1945 the improved Altec 604 was...
crossover designs, and a major reworking and improvement of the AltecLansingDuplex 604, the well-known high-fidelity coaxial loudspeaker driver originally...
do with competent design. The revolutionary coaxial driver, the AltecLansingDuplex 601 and 604, used a multicell horn for its high frequency component...
the AltecLansingDuplex 604 in 1944. This innovative driver has historically been regarded as growing out of the work of James Bullough Lansing who had...
mix. The studio monitors were Big Reds, popular boxes based on the AltecLansingDuplex 604 coaxial speaker, powered by McIntosh MC75 tube monoblock amplifiers...
were likely made by Western Electric. AltecLansing introduced the 604, which became their most famous coaxial Duplex driver, in 1943. It incorporated a...
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