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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: RE: horns aren't necessarily directional posted by cawson@onetel.com on August 26, 2024 at 12:47:52:
Horns may be configured to project a tight polar pattern, but they don't have to project a tight polar pattern. As for their high sensitivity, it's because a horn is an impedance transformer. Moving coil loudspeaker drivers have an inherent flaw, in that they're high impedance devices operating into a low impedance load, that load being air. 8 ohms doesn't sound like it's high impedance, but it's huge compared to the impedance of air. When a high impedance device operates into a low impedance load the power conversion efficiency is low. Direct radiator speaker efficiency is very low, around 2% on average. A horn provides a driver with a higher impedance load, so the speaker works with far greater efficiency. Horns run with an average efficiency of 50%. That efficiency is at the heart of why horns are more sensitive. It's not directivity. Logically it would seem that directivity is a major part of the equation, but as is so often the case with audio in this case logic is incorrect.
Look at it this way. You're in a rowboat using a pair of pool cues for oars. You'll get where you're going eventually, but those pool cues can't grab enough water to do the job effectively, no matter how fast you row. That's a direct radiator. Switch to a good pair of oars and you go a lot faster, while doing less work, because they grab the water so much better. That's a horn.
On the subject of listening with your eyes:
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Follow Ups
- RE: horns aren't necessarily directional - Bill Fitzmaurice 14:16:29 08/26/24 (4)
- A little more about listening with your eyes. - Tre' 12:14:20 08/30/24 (3)
- This makes lip reading a bitch - M3 lover 09:10:30 09/01/24 (0)
- RE: A little more about listening with your eyes. - Bill Fitzmaurice 19:10:21 08/30/24 (1)
- RE: A little more about listening with your eyes. - Tre' 19:03:26 08/31/24 (0)
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