Headphones are optimally suited for analyzing tonal artifacts in a recording but completely distort distance perception." -LINKWITZ "Headphones are completely unsuited for judging the spatial rendering of a stereo recording that is intended for loudspeaker playback. Money doesn't buy pleasure ever."-Alan Watts
"It's enormously important to understand that there is absolutely no possibility of having any pleasure in life at all without skill. Unfortunately very few of our current genre of acoustic tests have had this kind of introspection." - Geddes It is the perceived sound quality that matters not the measured quality – unless that measurement has been scaled and correlated to subjective perception through valid psychoacoustic tests. "Blind reliance on measurements can be misleading ‐ one needs to tie those measurements back to subjective perception. The room response gives a picture of the steady state SPL, where sound generation and sound dissipation in the room have reached their equilibrium." -Linkwitz The resulting curves must not be taken as a 1:1 representation of what is heard as loudness at different frequencies. " The room response must be averaged to recognize trends in the summation of direct and reflected signals at the microphone. To me, the overall sound of the little speaker was quite decent, albeit a bit, uh, bass shy. I don't know whether this is the same exact NHT as I had experience with a few years back, but if it is, its just bolsters my opinion that we're placing too much emphasis on controlled directivity. I used 4th order acoustic for both drivers in the Pioneer mod.
They appear to be mixed order acoustically for the NHT-quite gradual for the woofer, pretty steep for the tweeter. Perhaps this has to do with the crossover slopes involved. Yet there is much less directivity error. My mod of the little Pioneer BS22 uses a 4" "woofer' with a 1" dome with no wave guide, and the crossover point is around 2800 Hz, which is higher than that of the NHT. OR use a waveguide or a true midrange driver (anything LESS than 4 or a 4" designed for midrange specific duty) In other words you generally gain very little, a 4" woofer still needs to be crossed at nearly the same frequency as a 6". The directivity difference between a 4" and 5.25 or 6.5" is not much.
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