Glossary of Terms
Q | The energy losses of relative damping (ratio of stored to dissipated |
| energy or ratio of reactive to resistive energy). |
Fs | Free air resonance of driver in Hz. |
Qms Mechanical Q. | |
Vas | Volume of air equivalent to driver from the rest position. |
Cms | Mechanical compliance of a loud speaker piston. |
Mms | Moving mass of total loud speaker piston assembly. |
Xmax The maximum linear excursion of a loud speaker. | |
Sd | Surface area of the cone. |
Dia | The piston diameter of a loud speaker. |
Qes | Electrical Q of a system. |
Re | DC resistance. |
Le | VC inductance. |
Pe | Maximum input power. |
Qts | Total Q of the system. |
Sens Sensitivity. An efficiency measurement in dB’s. | |
Vc | Volume of a closed or sealed enclosure |
Vb | Volume of a vented enclosure. |
Fc | The resonant frequency of a closed or sealed system |
Fb | The resonant frequency of a vented system |
F3 The | |
Qtc | The Q of a loud speaker at Fc in a closed box, considering both |
| it’s electrical and mechanical resistance. |
QL | The Q of a vented box, resulting from all box losses. |
DV | Diameter of vent. |
LV | Length of vent. |
H | Height. |
W | Width. |
D | Depth |
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