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In Reply to: RE: "they are there and you at some distance" vs "they are in your room" dynamic range requirements posted by freddyi on September 17, 2016 at 11:52:59
"- does any of this make any sense ? - LOL
(a 3" driver is a headphone driver)
Karlson Evangelist"
Fred,
All a matter of the inverse distance law, most small speakers do not have the SPL capability of larger speakers, so to get a sense of a live performance in your living room, you need to move the lesser SPL speakers an appropriate distance closer.
It's easy, for every 6 db less output, you move the speaker half as far a way, until they are located so close to your head that you can't move it without gross imaging "fail", or poking your eye out on the corner :^) .
Art
Follow Ups:
Even with SPLs within their capability the small speaKer is working so hard, is so much closer to its limits, that the stress is easily heard. Dynamics even at lower levels (80db) are lower, distortion is higher, the amp is working harder, it all adds up.
Progress in the speaker industry has essentially meant smaller packages, with a huge tradeoff of ease, naturalness, real life dynamics, distortion (manifested as a more stressed, harsher sound).
You can't beat the physics, there is no free lunch, these are expressions heard frequently within technical staffs in high tech, defense, aerospace. They apply just the same to audio.
But how did we get here, folks might ask? Marketing, magazines, wife acceptance factor, among other factors.
Acoustic impedance match of speaker diaphragm to the air it connects with probably plays a part.
See 1st para, here:
The horn is the acoustic transformer.
The compression driver is a very efficient and low distortion motor to create the wave that the horn then matches the impedance to a better degree than a direct radiator driver.
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