Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
Have you ever measured the distortion of a tapped horn? For some reason, every distortion chart I've seen of a tapped horn shows high distortion, from 4x to 10x higher than a traditional basshorn through the passband. As an example, a popular commercial tapped horn sub produces 10% - 15% distortion at 28v. On that horn, 28v is approximately 200w, less than 1/100th of its 2400w rated power limit. Ten percent distortion at one percent power is not particularly impressive. Traditional basshorn subs are between 1% and 5% at the same drive level and push-pull driven folded horns have even lower distortion. I'm not sure what causes the increased distortion from tapped horns, if it's an unusual loading that does it or what but I am sure that the distortion measurements of commercial tapped horns have been noticeably higher than most other basshorn subs. Maybe DIY'ers will have better luck with them.
amazing nobody measures tapped horns! if they do they don't post them. i searched everywhere for distortion charts. almost nothing! weird isn't it? the only thing i found was here--
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