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The two most common types of speaker enclosure are acoustic suspension (sometimes called pneumatic suspension) and bass reflex.In both cases, the tuning affects the lower end of the driver's response, but above a certain frequency, the driver itself becomes the dominant factor and the size of the enclosure and ports (if any) become irrelevant.
Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials. [1] Hems are commonly used to reinforce an edge, hide burrs and rough edges, and improve appearance. [1]
applied to cutting-edge or radically innovative movements in art, music and literature; figuratively 'on the edge', literally, a military term, meaning 'vanguard' (which is a corruption of avant-garde) or "advance guard", in other words, "first to attack" (antonym of arrière-garde). avant la lettre
A-10 Thunderbolt II. The A-10 Thunderbolt II is among the player-flyable aircraft in the 1989 video game U.N. Squadron. [23] The aircraft is also featured in the 1989 video game A-10 Tank Killer. [24]