Driver behaviour, pistonic or ocillation?

[skorpion]

Henkjan wrote:

on the point of how a loudspeaker membrane actually moves, take a look at these movie clips from a Visaton BG20, made using laser measurements: http://www.klangundton.de/?p=324#more-324

May be people give up a bit too easy on this link, which is really interesting and illustrative to issues raised here.

In RealPlayer I can load any of the files. But to make them start I go to the Play menu and Stop the one loaded before I can start Play the next clip.

K&T explicitly mentions the Manger speaker remarking that the B20 7.5 kHz response looks like the Manger response. But that the B20 would produce such a result the K&T writer describes as 'accidental', evidently not believing in his own measurements.

/Erling

[BudP]

Good to see you out and about Derek. Come visit us on the EnABL forum some time or other. Did you ever get those 10 inch cones built up into drivers?

Bud

[Overkill Audio]

Hi Bud, Scorpion and all,

To All,

Sorry I am AWOL at the moment, moving house and very busy work wise.

Hi Bud,

Good to hear from you and I am glad your Enable system is being recognised and getting good results, its such a clever system!
I ran out of time and had to ship the system with modified Volt 10 inch drivers but saddly they were not Enabled.
When I get settled in the new house (3 months ish) I hope to have some time to build up a fully Enabled set of drivers.
As you can tell from this thread and other posts on Lynn's BTA thread I have become even more interested in energy transmission and conversion within loudspeaker systems.
I still have notes from our phone calls 3 years ago!!
As Randy Jackson would say " Props to the Enable Dog!!"

Hi Scorpion,

Very interesting, I will try and view the link, thanks for the information!

All the best

Derek.

[phase_accurate]

Hi Derek

I recently contacted Beyma in order to find out how the woofer/tweeter response graphs of the 6CX were made. It could be that they were done with a crossover in place since there is almost no overlap. If not there is very little chance that any type of subtractive trick would make a lot of sense.

But even then there would be other solutions left to achieve a flat group-delay response.

But let's wait and see what Beyma answers.

Regards

Charles

[Overkill Audio]

Hi Charles,

Thanks for that I will wait with interest.
Worst case (most expensive ) is a DEQX crossover which would also be great to integrate the sub woofers.

Thanks and all the best

Derek.