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The electrical impedance of the speaker varies with the back EMF and thus with the applied frequency. The impedance is at its maximum at F s , shown as Z max in the graph. For frequencies just below resonance, the impedance rises rapidly as the frequency increases towards F s and is inductive in nature.
Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...
A lower damping factor helps to enhance the bass response of the loudspeaker by several decibels (where the impedance of the speaker would be at its maximum), which is useful if only a single speaker is used for the entire audio range. Therefore, some amplifiers, in particular vintage amplifiers from the 1950s, 1960s and 1970s, feature controls ...
An amplifier must be able to suppress resonances caused by mechanical motion (e.g., inertia) of a speaker cone, especially a low-frequency driver with greater mass. For conventional loudspeaker drivers, this essentially involves ensuring that the output impedance of the amplifier is close to zero and that the speaker wires are sufficiently ...
Sonos announced back in August that it would allow Spotify users to control their music through the streaming service's app instead of having to use its own software. The feature rolled out to ...
A speaker with a higher impedance may have lower measured sensitivity and thus appear to be less efficient than a speaker with a lower impedance even though their efficiencies are actually similar. Speaker efficiency is a metric that only measures the actual percentage of electrical power that the speaker converts to acoustic power and is ...
This is called the nominal impedance. Amplifiers can therefore be safely specified to operate into a load that has this nominal impedance (or higher, but not lower). Typical nominal impedances for speakers include 4, 6, 8 and 16Ω , with 4Ω being most common in in-car loudspeakers, and 8Ω being most common elsewhere. A loudspeaker with an 8Ω ...
The main effect of is on the impedance of the driver, with high drivers displaying a higher impedance peak. One predictor for low Q m s {\displaystyle Q_{\rm {ms}}} is a metallic voice-coil former. These act as eddy-current brakes and increase damping, reducing Q m s {\displaystyle Q_{\rm {ms}}} .