Hesson11, that is a very eductional set of curves. Thanks for posting the link. In the 45 to 75 degree family of curves, you see that big bump between 2 kHz and 5 kHz? Unless you listen nearfield or under quasi-anechoic conditions, that bump is probably audible - and it's right smack in the region where the ear is most senstive, according to the Fletcher-Munsen curves. This excess off-axis energy in the lower treble region is caused by the tweeter having a very wide pattern just above the crossover point, and it's there on most speakers - but you cannot predict its presence from either the on-axis anechoic curve or the "listening window" curve. Kudos to SoundStage for measuring the off-axis response out to 75 degrees. Duke |
Thanks, Duke. I'm guilty of focusing too often on on-axis measurements, so it's good to get a bit of education from one as knowledgeable as yourself. BTW, I assume most Audiogoners are aware of this, but if you go to the link below, you'll find a great many speaker reviews that feature the same kind of NRC measurements as shown for the Usher Be-718. -Bob http://www.soundstageav.com/avreviews_speakers.html |
Duke, The K&H O 500 measurements are absolutely stunning (although the spectral decay plot may be hiding resonances as it cuts off at -25 db) I have read good comments about these speakers (except they do not play very loud - probably a direct result of their tremendous linearity and even dispersion - as everyone knows you can EQ down to get flat but you lose efficiency). Do you know what they sound like? I have not heard them. |
