Directivity...

[Chris A]

What's really spectacular is when you get to the horizontal or vertical spectrograms.  The horizontal spectrogram of the KPT-535 Jubilee, for instance:

 

[Schu]

^ That is very interesting looking chart/graph... I would love to see similar graphs/plots/charts of different speakers to compare. I would be willing to bet that it is VERY easy to see the differences with a plat like that

[Chris A]

Here's a horizontal spectrogram of a Danley SH-96 ($8800 each loudspeaker with 11 drivers internally):

 

 

This is likely very similar coverage/horizontal directivity to the K-402-MEH, i.e., the K-402 horn with additional off-axis ports for two 15" woofers.  This is one reason why I recommended to Roy the basic K-402-MEH design for not only home use, but also as a cinema offering by Klipsch Professional.  I think it would make a spectacular product, since the horn itself is much better than the one used in the SH-96.  There's more to the story, of course, than just directivity and reduction of overall size, but this is a strong argument. 

 

Chris

[Schu]

those spectrographs are awesome!

[Deang]

Spirographs are cool too. :-)

 

 

[Chris A]

Here's a rear view of the Danley SH-96:

 

 

The vertical spectrogram of the Danley SH-96 shows the effect of the tweeter/midrange crossover at ~4kHz more clearly, and is a design point to consider avoiding using a three-way rather than a two-way using the K-402:

 

 

This is one illustration of using directivity/coverage plots for visualization of the off-axis behavior of loudspeaker designs.  The EASE data has been a real eye opener for me.  This type of view can be used with the EASE data from other manufacturers to understand the behavior of their loudspeakers.  For instance, here is a plot of the KPT-942 (two way) showing the discontinuous widening of the coverage angles of the 2-woofer bass box crossing over at 580 Hz to the K-402 horn:

 

 

Chris