Assuming that the listener is 1 foot from the left speaker, and 8 feet from the right, the right will be attenuated 9 dB with line-source radiators, and 18 dB with point-source radiators. This effect is obtained for distances up to roughly two to three times the height of the line-source driver itself and is applicable to the frequency range where the length of the driver is long relative to the wavelength of interest. Line-source radiators like the BG's Radia "LA" series do not suffer the same physical and psycho acoustic limitations, as they are characterized by sound pressure levels that are linearly inversely proportional to the distance, resulting in a 3 decibel reduction in level with every doubling of distance rather than the 6 decibel drop with point-source radiators. The practical acoustical effect is that there is a 6 decibel (4-fold) drop in level with every doubling of distance. The classic expression of this phenomenon is that sound pressure level is inversely proportional to the square of the distance. The cone-type class of loudspeaker produces a characteristic radiation pattern that is best described as “point-source,” with output level diminishing rapidly as the distance increases between the listener and speaker. Now for the Geek-Speak directly from BGRadia web site: That way, more listeners can be within that area where the sound is best.īesides the Planar Tweeter technology, BGRadia are very well built consisting of solid construction and quality materials. An added benefit is that so called " sweet spot" (that position right in the middle of two stereo speakers where the music sounds like it's in your head) is much broader. another way of saying this is you can sit much further away from the speakers and get the same quality of sound from the tweeter as you can if you were sitting much closer. The high frequency sounds that are produced by the planar tweeters do not decay as rapidly and have a wider dispersion. Therefore, the sound waves propagate through a space much differently. Planar Tweeters are instead a flat surface as opposed to the dome surface. The traditional round tweeters push air based on their physical dome shape and therefore those sound waves propagate across the room in a given way. Sound is propagated by compression waves. If you are into the geek-speak about these read on but, for the rest of us, here is the quick and dirty explanation: So, what are we looking at here? BGRadia has developed and deployed Planar Tweeter technology. Take a look at a few of the BGRadia speakers below and notice one key visual difference compared to what you might expect to see on speakers.ĭo you see the difference? No little round tweeter, that's right. BGRadia Speakers and Planar Tweeter technology.
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