(sub)woofer for esl

[justice strike]

I'm going to build a hybrid speaker. I have however very little experience with the choosing of a woofer chassis. What are the main things i should look at? what would be the best complement to an esl speaker?

I did a lot of reading and it seems that a horn loaded woofer would come closest in respect to the characteristics of a esl. The theory supporting this makes an analogy with the old grammaphone. Where the vibration of the needle (very little) is amplified by the horn. Taking this analogy, it means that a woofer doesn't have to have a high amplitude, meaning that the mass of the cone will have less influence on the driving of the sound.

But this is only a theory. I've also seen some papers on Motional FeedBack. In which the feedback a speaker generates is measured and put back into the input of the speaker... but that scheme seems a bit complex for me to build (i havn't read it in detail though.

But first things first. What is a good chassis to use to complement a ESL speaker? And what kind of speaker design would be usefull?

[Jmmlc]

Hello,

With a philosophy quite similar to the ESL:

http://infraplanar.free.fr/infraplanar-english.htm

Best regards from Paris, France

Jean-Michel Le Cléac'h

[justice strike]

uhm... yes... i have no clue what that is... and it seems a bit big with a surface of 3 square meters...

[Andersonix]

Have you seen Linkwitz' website and discussion on dipole woofers?
Roger Sanders does a TL for his ESLs.
What do you mean by "woofer chassis"?
As you say, first things first: where's the ESL?!

[justice strike]

Originally Posted by Tosh

Have you seen Linkwitz' website and discussion on dipole woofers?
Roger Sanders does a TL for his ESLs.
What do you mean by "woofer chassis"?
As you say, first things first: where's the ESL?!

i want to make a woofer and then the esl to mount on it.

[tinitus]

Mating subs with ESL has to the best of my knowledge always been a problem

As I recall Gradient were among the first to achieve good result, with their big dipole subs

Just made a thread with this idea
A huge "membrane" coupled to any number of woofers
Membrane might even be simple polystyrene, hung in threads in a frame

[gainphile]

Dipole woofers are the closest thing to ESL in terms of polar response. Both have figure-of-eight radiation pattern.

http://www.euronet.nl/users/temagm/audio/dipolesub.htm

[Calvin]

Hi,

please do yourself a big big favour and design the ESL first!
When You are to design a car, where would You start? The motor or the exhaust pipe?

jauu
Calvin

[justice strike]

Originally Posted by Calvin

Hi,

please do yourself a big big favour and design the ESL first!
When You are to design a car, where would You start? The motor or the exhaust pipe?

jauu
Calvin

actually i would start with the chassis and the wheel base. Just as with the ESL The sub would be below the esl... Why can't i make the bass first? what's the disadvantage?

[Andersonix]

You don't know the physical width or height of the woofer box you need nor crossover frequency for starters. But once the ESL is completed, the bass unit is made to suit. And if you decide making the ESL is too difficult (It might happen even to you.), you didn't waste time making a woofer box.