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This article lists manufacturers of bass amplifiers, loudspeakers, and other amplification-related items such as preamplifiers. The amplifiers and loudspeakers used to amplify bass instruments (e.g., the bass guitar, double bass and similar instruments) are distinct from other types of amplification systems due to the particular challenges associated with low-frequency sound reproduction.
The middle speaker is a real loudspeaker. The top and bottom cones are passive radiators. In the same way as a ported loudspeaker, a passive radiator system uses the sound pressure otherwise trapped in the enclosure to excite a resonance that makes it easier for the speaker system to create the deepest pitches (e.g., basslines). The passive ...
This model soon became the SM-400. SWR then pursued development of a speaker cabinet to accompany its amps. In 1986, SWR released the Goliath, a 4 x 10" full-range speaker cabinet with a built-in horn tweeter, a first for bass cabinets. The company's name was changed to SWR Sound Corporation on 1 December 1997 as part of a restructuring plan.
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By the mid-1970s the company had become known for their car audio products and accessories, though they continued to sell other non-audio accessories for a short time longer. Sparkomatic was at that time primarily a producer of low to mid-range car audio products, as well as adapters to convert an 8 track player into a quadrophonic unit.
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