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JL Audio is an American manufacturer of consumer audio products. Known as one of the pioneers of the car audio industry, it manufactures marine, home, and mobile audio products, but are best known for their subwoofers. On September 20, 2023, Garmin completed the acquisition of the company and announced that JL Audio will join its marine segment.
Surface: 16,300 yd (15,000 m) [3] AA: 28,750 ft (8,800 m) [2] Filling. Lyddite, Amatol. Filling weight. 5 pounds (2.27 kg) The QF 4 inch Mk V gun [note 1] was a Royal Navy gun of World War I which was adapted on HA (i.e. high-angle) mountings to the heavy anti-aircraft role both at sea and on land, and was also used as a coast defence gun.
Muzzle velocity. 2,660 feet per second (811 m/s) Maximum firing range. 19,850 yards (18,150 m) at 45 degrees elevation. AA Range: 39,000 feet (11,890 m) at 80 degrees elevation [4] Filling weight. 9 pounds (4.08 kg) The QF 4 inch Mk XVI gun [note 1] was the standard British Commonwealth naval anti-aircraft and dual-purpose gun of World War II .
The 4″/50-caliber gun (spoken "four-inch-fifty-caliber") was the standard low-angle, quick-firing gun for United States, first appearing on the monitor Arkansas and then used on "Flush Deck" destroyers through World War I and the 1920s. It was also the standard deck gun on S-class submarines, and was used to rearm numerous submarines built ...
Class 1: maximum SPL 110-119 dB, the type of loudspeaker used for reproducing a person speaking in a small space or for background music; mainly used as fill speakers for Class 2 or Class 3 speakers; typically small 4" or 5" woofers and dome tweeters; Class 2: maximum SPL 120-129 dB, the type of medium power-capable loudspeaker used for ...
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 ...
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