Tech Talk 10: Loudspeaker Measurements

[@NickP333]

Fantastic vid, Danny. Thanks 🔊🎶😊

[@scottkasper6378]

I find myself saying “one k-hurt” now after binging on Danny’s videos

[@46wireboy]

Thanks, I needed this to make this stuff sink in properly. Please keep up these helpful tutorials!

[@JoelBursztyn]

Thank you!! I love your videos!! Yesterday I bought some driver from you I hope they will be good as I expect!!

[@ratedAD]

Wow, dude! Amazing content. Thank you very much.

[@JackWZ]

Thank you for your videos !!!! I have learned so much !!!! You are my mentor :)

[@johndost3087]

Thanks for this video. It explains a lot about the graphs.

[@ARGBlackCloud]

Excellent review of why speaker's have issues and what issues show up in measurement's. I am wondering though if you've found any correlation in phase response curves to breakup areas .

[@davidwatkins8016]

What a great presentation! Thanks.

[@normally624]

A very worthwhile and enjoyable series of talks . I would be interested in further information on what determines box size and shape . With thanks Leigh .

[@bigmetal...6877]

I thank you so much, for all you do.. learning a lot...

[@Tracks777]

nice content

[@Mrtscrp30]

Do you have any advice on type of speaker wire gauge, coating slid vs stranded etc.

[@dannyrichie9743]

For our internal wire we use a four 9's pure Copper in polyethylene, and it is solid core.

[@marcusjones1082]

Danny, can you explain what parameter I would look for to determine whether a driver is used for hifi use, pro sound use (as in on stage), or car audio use? I'm not sure if it would be in T/S parameters or something else.

[@LeonZita1]

Thank you or your advices and your technical overall knowledge that you pass. Please is it dificult for you when talking over a graph, to show what are you talking about with the mouse cursor viewable- something like voice over in other dimension- prefearbly with yellow circle around for easy view. Thanks a lot Leon.

[@porkchopspapi5757]

So how do you make a speaker have a good spectrial decay?

[@dannyrichie9743]

NO break up modes or stored energy issues. Lighter weight moving masses really helps and limiting exertion.

[@porkchopspapi5757]

@@dannyrichie9743 So film, foil or multiple dynamic drivers sharing the load. The later is what I did. Thanks.

[@NeilBlanchard]

This is the 300ms 20Hz-20kHz waterfall on my Linaeum LT1000 speakers - initial output is about 85dB and the floor is at 35dB: photos.google.com/photo/AF1QipPp-0vzUtRcpV6DrIVqnrpyr-nk-xfGOYdfZ663 As I watched your video, I realized that the spectral decay graphs you show are a different thing than the waterfall I got in REW? Unless mine in is in microseconds and yours is in milliseconds?

[@dannyrichie9743]

300ms is a long time. You are also looking at the decay rates of your room. I am showing the decay rates of the speakers only. Big difference.

[@NeilBlanchard]

@@dannyrichie9743 Okay, understood - I will see if I can get a gated / pulse measurement, in REW.

[@NeilBlanchard]

@@dannyrichie9743 Thanks for your reply - I was attempting to find out more about what the waterfall graph in REW is showing, and I am still not sure. I redid the EQ filters and now have the response smoother, and pretty close to a room curve.

[@dannyrichie9743]

@@NeilBlanchard It is showing how long it takes for the room reflections to die down. Unfortunately it will all change with SPL.

[@NeilBlanchard]

@@dannyrichie9743 Okay, that makes sense. I am now wondering if REW can do a cumulative spectral decay measurement, or what program that I can use, can do this?

[@davidjudd951]

My wife gets upset with the low frequency of my responses to her, while she talks to me.

[@securityvlogger6825]

You’ve been wearing the same shirt for a week...

[@Bryan-th6rc]

Lol. He probably recorded all the videos in the same sitting

[@dannyrichie9743]

Last night I recorded two video's again. Maybe I should swap shirts between shoots.