Are you sure that you measured your speaker correctly?

What's the correct way to measure TS parameters?
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Music Credits:
"Werq" Kevin MacLeod (incompetech.com)
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[@maxvaly7747]

For Vas, I use metal or ceramic bowls, they are very sturdy, very easy to measure internal volumes and the hemisphere shape is ideal as an enclosure. I stick a sponge between the bowl and the speaker and is very easy to secure any speaker with scotch tape. I used this method up to 12 inch speakers.

[@euroshopperbier1337]

I hope this channel blows up. Excellent video my man

[@shining31]

In REW & VituixCAD, you can also try the double mass added method. There is a paper that show that it's help for VAS precision.

[@disklamer]

In olden days, some people used large open cardioid baffles, the cardioid shape has a nice even responses being either equally good, or equally bad across the board. It does need to be rather hefty, with size also a factor, iirc the circumference would be the wavelength of the cutoff frequency of the baffle. They also look cool, like huge lilypads.

[@Randy_G]

Great job and thank you

[@Grommet2007]

Closed-box and handheld methods are the two methods I use. Oh, and I don't build boxes for the closed box method. SWMBO has a various assortment of pots and pans in the kitchen that can quickly double as a "closed box" with the use of a suitable baffle. Some of them are actually perfect fits for the driver, no baffle required :-). Volume is easy to measure with water and a measuring cup. In any case, Vas variation of up to 20% is going to have minimal impact on speakers designed with the measured parameters anyway.

[@rikardekvall3433]

Kitchen. Good idea. Thanks

[@UserKadosh]

can you do a video on designing and building a rear loaded horn

[@rikardekvall3433]

AJ: Free air measurement first, then attach the woofer it to the closed box and measure again, with the closed box option?

[@2002ZRX1200R]

The DATS V2 did not agree with my S&L WT2, but my WT2 agreed with Klippel.

[@criven3128]

Heck yeah

[@rodrigoraynor]

Can i ask if you can compare with the data that the brand give us online ?

[@qlewer670]

Different mass = different Vas, how much mass needs to add and why? Are you try to compare different masses and results?

[@rikardekvall3433]

Thanks. Good information. Is there a need for adding the volume of cone, facing inwards the hole? You measured the box and hole. I got the DatsV3 for a my old vintage speakers. Sadly I get different VAS every time I measure and it’s way too high (120 vs 75 liter) compared to the original cabinet.

[@AudioJudgement]

In my opinion that volume should be taken into account. But it's difficult to measure and hopefully it's small enough to not influence the measurement too much.

[@pabloosvaldopenizzotto1098]

Great video! This approach is very useful. Just one question. What is the reccomended mass to add to the cone? Is there a limit?

[@AudioJudgement]

You need to add sufficient mass to lower the Fs by 25% or more. There is an upper limit. Don't add mass which is more than the actual moving mass of the speaker.

[@pabloosvaldopenizzotto1098]

@@AudioJudgement Thank you!

[@nikolatesla4030]

How do yo add mass on vertical speaker? Won't it fall down?

[@AudioJudgement]

Blu tack sticks quite nicely.

[@hrmny_]

Now try the methods with an 18 inch woofer and see which ones are still viable 🙃

[@simonzinc-trumpetharris852]

I don't measure my speakers - I listen to music on them.

[@zoltank2125]

It's great that you can hear the T/S parameters 😁

[@paulgyro]

Great, So do I! Along with movies, TV shows, and video games. I also design and build loudspeakers.