Speaker parameters

Refers to the speaker using a dedicated test system to test out various performance parameters of the bookshelf computer speaker specific value of its common parameters include :. Z, Fo, η0, SPL, Qts, Qms, Qes, Vas, Mms, Cms, Sd, BL, Xmax, Gap gauss. these are the physical meaning of these types of arguments
Z: is the resistance value of the speakers , including: Rated impedance and DC resistance . ( Unit: ohm / ohm), usually refers to the nominal impedance of the speaker 's rated impedance Z: is the minimum impedance value of the first great behind the curve impedance modulus value , which is calculated on the basis of the DC electric power speaker impedance DCR:. refers to the voice coil stationary, through a DC signal, and test out the impedance value we usually call is 4 ohms or 8 ohms . refers to the nominal impedance.
Fo ( lowest resonance frequency ) is the bookshelf speaker impedance curve corresponding to the first maximum frequency unit : Hertz (Hz) speaker impedance curves under normal operating conditions, the measurement method or constant voltage constant current speaker Law was the speaker impedance modulus versus frequency curve.
η0 ( speaker efficiency ) : refers to the speaker output acoustic power and input power ratio .
SPL ( sound pressure level ) : refers to the speaker impedance in the pass 1W of power at rated power voltage, and speakers away from the reference axis sound pressure generated on the point of 1m units : decibels (dB).
Qts: total quality speakers due to value.
Qms: mechanical quality factor values ​​speakers .
Qes: speaker quality factor values ​​.
Vas ( Speaker of the effective volume ) : refers to the volume of air in a sealed container in a rigid acoustic -acoustic speaker unit along with equal units : liters (L).
Mms ( moving mass ) : refers to the quality of the speakers participating in the sum of the components of vibration during movement , including the paper part of the drum , voice coil , playing the waves and vibrations involved in air quality and other units : g (gram).
Cms ( force along ) : refers to the supple -degree speaker vibration system support components of the greater its value , the speaker of the whole vibration system softer units : mm / Newton (mm / N).
Sd ( vibration area ) : refers to the process of the speaker vibration , the effective vibration area drum paper / diaphragm unit: square meter (m2).
BL ( magnetic ) : gap magnetic flux density and the product of the effective coil length units :. (T * M).
Xmax: Voice coil motion during vibration linear stroke unit: millimeter (mm).
Gap Gauss: gap magnetic flux density value unit: Tesla (Tesla).