[Danny Richie]

Have you guys been following along?

I started with the measurements we most hear about in the market place.

https://www.youtube.com/watch?v=4hW9Q2Wv6WE&list=PLUFNGRKZZWXzCt2Syx4yjR4Oy7V-uiePB&index=10&t=1s

Last week were the measurements that really matter.

https://www.youtube.com/watch?v=XK38MZXn4mA&list=PLUFNGRKZZWXzCt2Syx4yjR4Oy7V-uiePB&index=11&t=557s

This week, we looked at the most important tool used in the design stages. Check it out.

https://www.youtube.com/watch?v=G7jEAhp5Fk8&list=PLUFNGRKZZWXzCt2Syx4yjR4Oy7V-uiePB&index=12&t=0s

[AKLegal]

The second video is my favorite yet.  I thought I had an idea how to read impedance and spectral decay plots but it turns out that I was an idiot.

[maty]

I just watched the second video and it is fantastic.
Many thanks from Spain.

[revg1952]

Danny
all of these are very interesting
But i have to agree video #2 was exceptional.
being a former VMPS dealer it was totally eye opening.
keep it up Professor.

thanks
Gary

[mlundy57]

I agree and have a question: How do you read the spectral decay when a segment appears to dog-leg to the right crossing a number of frequencies?

I would also add the room room issue completely.

Mike

[maty]

I just opened a thread in ASR forums / Speakers, Headphones and Room Acoustics. With four screenshots for now.


[Video] Speaker measurements by Danny Richie

https://www.audiosciencereview.com/forum/index.php?threads/video-speaker-measurements-by-danny-richie.8840/

[Jmitchell3]

Loved all of these. Thanks Danny!

[maty]

I suggest a subject for an upcoming video:

Box speakers with very wide and very even dispersion?

https://www.audiosciencereview.com/forum/index.php?threads/box-speakers-with-very-wide-and-very-even-dispersion.9582/

Its advantages and the problems associated with the room.

Oh, you have a video, The Most Important Audiophile Tool | The Room

https://www.youtube.com/watch?v=G7jEAhp5Fk8&list=PLUFNGRKZZWXzCt2Syx4yjR4Oy7V-uiePB

but it is very generic.

[maty]

Thank you very much for the video!

Acoustic Center Spacing and Why it Matters!
https://www.youtube.com/watch?time_continue=1&v=HByEmfg7kis





The speaker is the GR Research N2X kit: http://gr-research.com/n2x.aspx

[revg1952]

Danny
the video's continue to be more helpful and interesting; plus you continue to seem more natural in your on camera presence
keep it up
 Gary

[Danny Richie]

Thank you very much for the video!

Acoustic Center Spacing and Why it Matters!
https://www.youtube.com/watch?time_continue=1&v=HByEmfg7kis





The speaker is the GR Research N2X kit: http://gr-research.com/n2x.aspx

Actually the speaker that I used in the example was the N1.

http://gr-research.com/n1.aspx

[Danny Richie]

Danny
the video's continue to be more helpful and interesting; plus you continue to seem more natural in your on camera presence
keep it up
 Gary

Thanks. I appreciate that.

[Tyson]

Danny
the video's continue to be more helpful and interesting; plus you continue to seem more natural in your on camera presence
keep it up
 Gary

Agreed!!

[Jaytor]

Another great Tech Talk. Thanks Danny.

[maty]

About the usual dip in vertical axis in many speakers, new model from Focal, Chora 806 with this problem:

https://www.audiosciencereview.com/forum/index.php?threads/new-focal-chora-806-on-and-off-axis-measurements.9613/

Vertical above and below tweeter 0/5/10/30 degrees:

Here things get quite a bit messier, with notable dips forming around the 3Khz crossover merely a few degrees off-axis. You'll want to get the vertical height just right for the best sound; you'll probably want a stand with adjustable height or angling.

(Note that the '0' graph looks a bit different here because my vertical measurement technique involves putting the speaker on its side. This has an effect on the measured on-axis curve, but my intention here is to show off vertical dispersion.)

[maty]

BTW, Danny, what do you think about: "Tilted stand for Time Alignment" of the 826 towers.



Good, very good or cheap solution?

[Danny Richie]

Tilting a speaker back to more physically align the drivers doesn't always make an improvement. It can, but it depends on a number of factors.

Having the drivers physically aligned verses having an offset from a typical baffle mounting requires a different type of crossover. The crossover will shift phase to bring the alignment back in time acoustically. So then tilting it might make it off. You'd have to measure them to see where the center axis is for being in absolute acoustic phase.