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Sixteen ohm drivers (or loudspeakers systems) would be connected to the 16-ohm tap, 8 ohm to the 8 ohm tap, etc. This is significant since the ratio between the loudspeaker impedance and the amplifier's impedance at a particular frequency provides damping (i.e., energy absorption) for the back EMF generated by a driver.
American EIA standard RS-299A specifies that (or DCR) should be at least 80% of the rated driver impedance, so an 8-ohm rated driver should have a DC resistance of at least 6.4 ohms, and a 4-ohm unit should measure 3.2 ohms minimum. This standard is voluntary, and many 8-ohm drivers have resistances of ≈5.5 ohms, and proportionally lower for ...
A speaker driver mounted on a finite baffle will display a physical phenomenon known as interference, which can result in perceivable frequency-dependent sound attenuation. This phenomenon is particularly noticeable at low frequencies where the wavelengths are large enough that interference will affect the entire listening area.
The NS-10 is an 8-ohm two-way loudspeaker with a 10.4-litre sealed cabinet measuring 382 × 215 × 199 millimetres (15.0 × 8.5 × 7.8 in) and weighing 6 kilograms (13.2 lb). [5] [4] Its 2.5 cm (0.98 in) particle-board cabinet has a wood veneer skin with seven black finishing layers. The domestic version of the speaker was vertically oriented ...
A horn-loaded speaker can have a sensitivity as high as 110 dB at 2.83 volts (1 watt at 8 ohms) at 1 meter. This is a hundredfold increase in output compared to a speaker rated at 90 dB sensitivity and is invaluable in applications where high sound levels are required or amplifier power is limited.
New mounting brackets allow the newly designed speakers to mount nearly flush to the wall. [37] In the past, Bose has manufactured a 6.1-channel Acoustimass system, the Acoustimass 16, which featured five "double cube" satellite speakers, a single center-channel speaker, and an Acoustimass bass module. [38]
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