Ran them in with a 90hz sine wave for four hours, and now I’m listening critically for the first time. Soundstaging(different from imaging, which can happen without “depth”)is staggeringly good. I’m assuming this is due to the lack of any crossover anywhere near the ear’s sensitive range between 1 and 5khz.
The 10F/8424 in a front horn is excellent. %THD is well under 1% at 250Hz and drops to only 0.10% from 500Hz-3kHz. Subjectively it has a very balanced sound that is both lively and smooth...with no breakup until around 18kHz. In a non horn configuration (direct radiating) the best the 10F/8424 can do is 0.8% through the midrange. %THD is well above 1% at anything below 500Hz with direct radiating.
I would be curious as to what is causing the 12kHz peak...if it's a resonance or if it's just the natural rising response of the driver which isn't a bad thing it simply depends on how your using it.
There appears to be no fr aberrations above or below that peak, so I would imagine that it would be due to a natural rise and not to storage problems
Zaph and Hifi Compass both measured no more than about .5% thd above 500hz. All depends on the reference volume level relative to mic distance
Yes this is true. I typically measure at 1 meter since I think it more truly represents what we hear from within the first 3 milliseconds of the impulse response.
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