Danger
Many conventional subwoofers do not respond very well to infrasonic frequencies. If a test is played at high signal levels, it may damage or destroy conventional loudspeakers, even if nothing can be heard. In a ported subwoofer enclosure, the drivers may be driven past their maximum excursion, due to the lack of back pressure below certain frequencies – they may bottom out and suffer mechanical damage. In a sealed enclosure, the drivers will not move as much because of the back pressure in the box (which will greatly reduce the risk of mechanical damage), but a strong amplifier signal can still damage them by overheating the voice coil.
Read more about this topic: Bass Test
Famous quotes containing the word danger:
“How superbly brave is the Englishman in the presence of the awfulest forms of danger & death; & how abject in the presence of any & all forms of hereditary rank.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“The so-called consumer society and the politics of corporate capitalism have created a second nature of man which ties him libidinally and aggressively to the commodity form. The need for possessing, consuming, handling and constantly renewing the gadgets, devices, instruments, engines, offered to and imposed upon the people, for using these wares even at the danger of one’s own destruction, has become a “biological” need.”
—Herbert Marcuse (1898–1979)
“Every generation rewrites the past. In easy times history is more or less of an ornamental art, but in times of danger we are driven to the written record by a pressing need to find answers to the riddles of today.... In times of change and danger when there is a quicksand of fear under men’s reasoning, a sense of continuity with generations gone before can stretch like a lifeline across the scary present and get us past that idiot delusion of the exceptional Now that blocks good thinking.”
—John Dos Passos (1896–1970)