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1947 – JBL has a 15" speaker (38 cm), model D-130, using for the first time a 4" (100 mm) voice coil in a speaker cone; 1949 – James. B. Lansing dies of suicide; William Thomas became president of the company; 1954 – The 375 compression engine is the first 4-inch engine sold; its response extends to 9 kHz
The permanent magnet upgrade of the 601 was released in 1944 as the 604, at which point the 601 was discontinued. [5] The 604 was the same basic design using a 15-inch LF driver, but with a larger 3" voice coil, individual Alnico V magnets for the LF and HF drivers, and a cast aluminum frame.
A coaxial loudspeaker is a loudspeaker system in which the individual driver units radiate sound from the same point or axis. Two general types exist: one is a compact design using two or three speaker drivers, usually in car audio, and the other is a two-way high-power design for professional audio, also known as single-source or dual-concentric loudspeakers. [1]
One uses a cone made from titanium foil 0.025 mm thick and an improved version that uses 0.15 mm thick carbon fibre. These are used in their range of audiophile loudspeakers. [2] Large electrostatic loudspeakers may be considered as full-range speakers in the sense that they are capable of reproducing most of the audio frequency band.
A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an electroacoustic transducer [1]: 597 that converts an electrical audio signal into a corresponding sound. [2]
The unit provides two separate inputs so different instruments can be plugged into the rotary and stationary components respectively. The 2121 is a 15-inch (380 mm) stationary speaker that uses digital signal processing to emulate the rotating drum found in older Leslies. [25] The 3300 is the same as the 2121, but with a 300 watt power ...