[panomaniac]

Interesting stuff.  As it's meant for printing, I wonder if printers, sign shops or their suppliers might have it?
EDIT: Oh look, here's some in the USA. http://www.mediaforprinting.com/honeycomb-display-board.html

[panomaniac]

Nice fix!    How low do they play?  Low enough to match with a typical subwoofer?

[Kludden]

Hi CLS!
I like to see pictures of your speakers.

I still use cc board with an modified fullrange speaker.


and back



Kludden

[panomaniac]

Thanks CLS, that's good to know.

OTOH, a clean enough sub with proper directivity to match the panel is the difficult portion, I guess...

  Yes, yes.  A problem with almost all panel speakers.

Kludden, that looks nice and clean.  How's it working?  And go you mean that you made the exciter out of a fullrange speaker?

[CLS]

Yes, nice and clean are exactly the words in my mind before seeing pano's comments. 

Clever and clean support of both the panel and exciter!

 

[zygadr]

Kludden, very, very nice!

Yes, that corrugated cardboard is allways sitting in the back of my mind...........still a great sounder.

How about some close up pics and details of your home made exciter!

[Kludden]

Hi all!
Thanks. It is not a self made exciter. I took an 3 inch fullrange speaker, cut off the membran and glued a piece of tube wood to the spool, instead of the membran.
And I also cut of all steel near the magnet. Also glued an aluminium bracket on the magnet, so I could adjust the exciter up an down on the wood support.
I couldnt get the el cheapo exciters in Sweden, but I have to try this sort of panel .
To expensive to order the exciter from Partexpress USA.

Kludden

[CLS]

....

 It is not a self made exciter. .... 

It IS ! By your description. Well done!

How did you cut the frame/bascket of that driver?

I got some 8" fullrangers on hand, maybe good for some (super)high-shove transducers 

[inrank]

Anyone used the Visaton EX60S 8Ohm Exciter, its around £20/ea over here, could be worth a go?
http://www.visaton.de/en/industrie/koerperschall/ex60s_8.html
Link on their site to a pdf with FR measurements on MDF.

The EX45 is a bit cheaper, only around £100 for 8, rather than £150 for 8 of the EX60's.

[CLS]

Looking good. I like its mounting plate, way better than the cheapo I'm using. 

[inrank]

Is the only advantage of using multiple exciters for SPL?
I only have a small room, around 8-9ft square-



Would one be suitable for lower volumes (I was using the Omnes Audio BB3.AL (Veravox 3) in OB, and was getting enough overall SPL from that (no bass though to be expected.)

[pol_bct]

Is the only advantage of using multiple exciters for SPL?
I only have a small room, around 8-9ft square-
...
Would one be suitable for lower volumes (I was using the Omnes Audio BB3.AL (Veravox 3) in OB, and was getting enough overall SPL from that (no bass though to be expected.)

if you are not into hi-SPL, yes, one transducer may be enough
but you should consider a taller panel to get into more serious bass
1.8mx0.6m wont hurt even if you are in a small room...

POL

[zygadr]

The Visaton exciter is no better than the Dayton's and other similar types. Don't be fooled by their higher price. 

[CLS]

The cheapo I bought from PE is listed US$5 a pair. The freight to Taiwan makes it double, but $5 each is still pretty cheap. (should be the cheapest of all, there's a minimum order of 10, though... )

Point is, it's a decent device and has pretty good reputations here. I'm also quite happy with it.

The bass frequency response of the Visaton looks odd to me. It drops very fast below a point (around 40~50Hz). I'm wondering if it's because the narrow spider, thus a very limited excursion (?)

[Kludden]

Here is a picture of my modified exciter.



You could hardly belive it, but it sounds great
Kludden

[inrank]

Cool, Cheers. The main reason for going for the Visaton is that none of the others (so far researched) are available here in the UK. And cheaper one bought from the US will be just as expensive by the time it gets over here.

[panomaniac]

MCM Electronics is selling the Visaton exciters in the US, now.
http://electronics.mcmelectronics.com/?N=&Ntt=visaton&x=0&y=0

[zygadr]

Here is a picture of my modified exciter.



You could hardly belive it, but it sounds great
Kludden

Kludden, is that peice of wood hollow or solid?
The feet on normal exciters are hollow, so I wonder if this makes any difference?

[CLS]

He said it's a "tube":

....
 I took an 3 inch fullrange speaker, cut off the membran and glued a piece of tube wood to the spool, instead of the membran.
 ....

 

I'd suggest, maybe it'd be even better to have some venting paths among the VC former, pole piece ... etc. 

[inrank]

This looks good-
http://www.ultraboard.co.uk/
Quick quote is for two panels 2000mm x 600mm with-
6mm @ £12
10mm @ £15
18mm @ £18

Seems good, would the 6mm be too thin/bendy?

Do they need to be 'grounded', for example, the back of the magnet attached to a rigid support or just move in free air? Some people have a support, some dont. Will there be any cancellation going on if its just in free air?

I think i will just get a pair of the Visatons for the moment!