ralphpnj wrote: > I'm a bit lost here, could you please put the db/w/m measurement in > context?
90 dB/W is typical of the efficiency of a typical home audio speaker. 100 dB/W would be more appropriate for the large horn-loaded speakers used for sound reinforcement. 80 dB/W speakers are very inefficient. > > Your comment about using equalization to overcome physical laws makes me > think of smartphone, tablet, laptop and many bluetooth speakers which > use DSP, like the Devialet, to make their tiny speakers sound halfway > decent. DSP is a specific case of a general approach to audio which involves driving non-flat speakers with non-flat sources that are (hopefully) designed to compensate for the non-flat speakers. Just because a device uses equalization does not mean that it necessarily uses a DSP. There are many other means for equalization that are commonly used. For example passive loudspeaker crossover networks can be designed to act as equalizers and frequently are. The laws of physics are never overcome, but they can be played off against each other to obtain a desired result. Equalization can be used to trade off the frequency response of the speaker drivers, the room, and the crossover network. If the speaker drivers lack the dynamic range required to product loud, clear bass, then there are obvious audible problems. The fundamental law at work relates to the size of the diaphragm and its linear excursion. A small driver that is equalized to extend its bass response can work very well if there is sufficient linear range of movement of the diaphragm. One common end run on a lack of dynamic range is to turn down the equalization before the speaker is driven into audible distortion. What happens is as the user increases the system gain close to the point of audible distortion, the gain control stops increasing level. Many people don't notice that their recent increases of system level aren't actually making any change. Being able to turn the knob with no actual effect still satisfies their actual need. Yup, placebo effect. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=105563 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
