"The 604 coaxial loudspeaker of 1943 was a very successful combination of a small multicellular horn mounted concentrically with a 15-inch woofer. Working with John Hilliard, Lansing developed the A-4 theater system, a large two-way system standing about 8 feet high, which made use, for the first time in theater systems, of a low-frequency enclosure that was not open in the rear. The combination of horn loading through the mid-bass region and porting in the low-frequency range gave the system a level of low-frequency performance in the theater that had been unknown before. The high frequency section made use of a traditional high-frequency annular slit phasing plug driver with a three-inch voice coil, the model 288. The low-frequency transducer in the A-4 theater system was the model 515 loudspeaker, a fifteen-inch loudspeaker with a three-inch voice coil. It was the first low-frequency transducer to make use of flat wire. These early systems used field coil structures for attaining high flux levels in the transducers, since the permanent magnet materials of the day were not strong enough to provide the necessary field strength for these systems."
Sta je multicellular horn,transducer,flat wire,voice coil?Koja je nasa rec za two-way system?
ceo text mi je skroz nerazumljiv.
Sta je multicellular horn,transducer,flat wire,voice coil?Koja je nasa rec za two-way system?
ceo text mi je skroz nerazumljiv.
