Let’s start with the sensitivity or could it be efficiency then bandwidth, what’s normal and what’s the top end units have? Impedance, why 4 ohm or 8 ohm, where is the performance and the reasons for the difference? Where might Ifind a thread explaining all this stuff? Thanks
An average sensitivity is 88dB/2.83V@1m
Values can range from 80dB/2.83V@1m (flat panel speakers) to 95dB/2.83V@1m (professional monitors).
The attached graph shows the range of sensitivities of a selection of modern loudspeakers.
I found this informtion here: HiFi Loudspeaker Design
The lower the impedance, the more easily electricity (the signal) flows through the speaker. Low impedance is particularly helpful in car audio systems as the driving voltage available from a car amplifier (powered by a 12V battery) is lower than that available from a home amplifier (powered by the 120/240V mains supply). Hence, 4 ohm is traditionally the impedance of car speakers and 8 ohm is traditionally the impedance of home speakers - although nowadays this distinction is becoming blurred.
Values can range from 80dB/2.83V@1m (flat panel speakers) to 95dB/2.83V@1m (professional monitors).
The attached graph shows the range of sensitivities of a selection of modern loudspeakers.
I found this informtion here: HiFi Loudspeaker Design
The lower the impedance, the more easily electricity (the signal) flows through the speaker. Low impedance is particularly helpful in car audio systems as the driving voltage available from a car amplifier (powered by a 12V battery) is lower than that available from a home amplifier (powered by the 120/240V mains supply). Hence, 4 ohm is traditionally the impedance of car speakers and 8 ohm is traditionally the impedance of home speakers - although nowadays this distinction is becoming blurred.
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Sensitivity measurements of 88 dB are about average. Anything below 84 dB is considered rather poor sensitivity. The sensitivity of 92 dB or higher is very good and should be sought after. For example, a speaker with an 85 dB efficiency rating will take twice the amplifier power to reach the same volume as a speaker with 88 dB efficiency. Speaking about numbers and data, at https://www.sunsigns.org/angel-number-55-meaning/ you can find all the meanings of the number 55 from an astrological point of view, and the impact that this number can have on your life.