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Two-inch port tube installed in the top of a Polk S10 speaker cabinet as part of a DIY audio project. This port is flared. Unlike closed-box loudspeakers, which are nearly airtight, a bass reflex system has an opening called a port or vent cut into the cabinet, generally consisting of a pipe or duct (typically circular or rectangular cross section).
The birth of the modern transmission line speaker design came about in 1965 with the publication of A.R. Bailey's article in Wireless World, “A Non-resonant Loudspeaker Enclosure Design”, [16] detailing a working Transmission Line. Bailey followed up his first article with a second one in 1972. [18]
These designs can be considered a mass-loaded transmission line design or a bass reflex design, as well as a quarter wave enclosure. [39] Quarter wave resonators have seen a revival as commercial applications with the onset of neodymium drivers that enable this design to produce relatively low bass extensions within a relatively small speaker ...
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.
Many manufacturers abbreviate the number and size of speakers in the name of their equipment. A cabinet with two 10" speakers may be called a "210". Another abbreviation that is used is to add the wattage to the name, so a 500-watt Yamaha combo amp with two 12" speakers may be called the "Yamaha 212-500".
Moving iron speaker. The original loudspeaker design was the moving iron. Unlike the newer dynamic (moving coil) design, a moving-iron speaker uses a stationary coil to vibrate a magnetized piece of metal (called the iron, reed, or armature). The metal is either attached to the diaphragm or is the diaphragm itself.
The weight of the cone of the passive radiator should be approximately equivalent to the mass of the air that would have filled the port which might have been used for that design. If the passive radiator's acoustic mass equals that of the port, and the passive radiator's compliance is negligible, then the frequency response behaviour of these ...
[39] [40] Both products were 5.0 passive systems, with the Acoustimass 6 using "single cube" satellite speakers [41] and the Acoustimass 10 using "double cube" satellite speakers. [ 42 ] The "Acoustimass 15" 5.1 is a true 5.1 system was sold from 1998 until 2006 it includes an amplified sub, [ 43 ] and the "Acoustimass 16" 6.1 system was sold ...