Beyond the Ariel

[sendler]

Originally Posted by soongsc

I thought "harmonic" was a frequency domain thing.

Harmonic is a wave thing.
Physics Tutorial: Guitar String Harmonics

[soongsc]

So, it should show up in frequency domain which does not seem to be the case.

[Paul W]

Originally Posted by soongsc

Diffraction is quite obvious. It would be interesting to see a CSD.

What we both thought was diffraction turned out to be reflection from a projector box hanging from the ceiling...I moved the mic into a position to "see" the reflection...oops! Pretty sure there is a CSD plot in the thread.

[sendler]

Originally Posted by soongsc

So, it should show up in frequency domain which does not seem to be the case.

So I guess this is another example of the very sensitive wavelet transform showing us something that is so minor that we won't hear it.

[soongsc]

Originally Posted by Paul W

What we both thought was diffraction turned out to be reflection from a projector box hanging from the ceiling...I moved the mic into a position to "see" the reflection...oops! Pretty sure there is a CSD plot in the thread.

Referring to the plots below, if it were a projector box, I would have expected all curve to show the same wriggles. If you were moving the mic to do off-axis measurements, then it would be a different story. I just assumed one would rotate the speaker.

Originally Posted by g3dahl

Just read the thread on htguide. Below is just the horn and driver at 2 m, at 0, 10, 20, 30 and 40 degrees off axis. Paul said that the deep notch at 14 kHz didn't happen with his other ND1460A's on his own waveguides.



And here is the woofer response:



It's an interesting thread. Paul did impressive work to integrate the system so nicely. Wish I could take a listen.

Here's the thread: HTGuide Forum - The Raptor ... a 10" MTM

Gary Dahl

Hmm, looked through that thread. The CSD of the horn looked nice, wonder what happened when it got integrated with the system.

[IslandPink]

Lynn
You asked a few days ago about the Onken/Jensen cabinets I'm making .
The design is basically the standard design as given on the Supravox site :
http://www.supravox.fr/kits/jensen.pdf

I looked for a while at alternative alignments but could see the inevitable trade-offs of low-end extension . I'm not intending to add any further bass complexity due to space considerations . I'm hoping it will be an OK trade-off with the nice Supravox 285GMF which have very light cones .
The current philosophy will be to drive these bass speakers from a Pass F4 driven from a valve linestage or a pick-off from the driver of the SE amp that will be driving the Horns and G3 ribbons . I'm hoping the Class-A and feedbackless nature of the F4 will help integration between bass and mid sections . I should at least get the same sort of spatiality from the F4 as a valve SE amp .

Mark

[mige0]

Originally Posted by mige0

Excellent idea ! - where did I have my thoughts ?


...
Michael

For what it is worth - enjoy !


http://www.kinotechnik.edis.at/pages...ts_of_View.pdf


Michael

[mige0]

No longer hijacking this thread with "shuddering" topics...

„CMP framing“ – what the ** you mean ?

[slowmotion]

Any more news on Gary's progress?

[g3dahl]

I can give a quick update...

The low pass filter for the TD15M is finished and came out beautifully (in terms of the rolloff shape, IR and CSD). The high pass filter for the Radian 745 is in progress. The circuit has been simmed but not yet built. I was waiting for some autoformers and custom inductors from dave slagle (Intact Audio) and other various parts, but everything's here now. I will have a chance to put them together and run some tests this weekend.

With any luck, I'll get to hear some music through them very soon! (getting tired of test signals...)

Gary Dahl