50-100W Powerful 4/8ohm Flat Panel Exciter Sound Exciter Speaker - Dongguan Dason Electric Co., Ltd. - ecplaza.net
This one was used on post 2196
Steve.
This one was used on post 2196
Steve.
This looks quite interesting. Dayton Audio DAEX30HESF-4 High Efficiency Steered Flux Exciter with Shielding 30mm 40W 4 Ohm
The 30mm seems to have a better hf than the 25mm version on the xps plot?
Steve.
The 30mm seems to have a better hf than the 25mm version on the xps plot?
Steve.
Spedge,
Great link. Found this set of interesting articles there:
SoundRight - Peter Mapp
Thanks,
Eric
I would like to have your sincere opinion, in your opinion this type of sound diffusion is still valid or honestly it has failed or in any case it has not reached a sufficient level of quality, the doubt also comes to me when I look at that tectonic for example at the moment seems to me focused on substantially traditional loudspeaker system even if it partially exploits the technology having a flat membrane. What do you think is really the limit? thank you
Pixel1.
The uptake of manufacturers to produce quality dml panels has been disappointing to say the least.
I blame NXT (rightly or wrongly) for not producing the high quality panel to start with,instead they sold licences ,and they were mainly used as toys .
And even now they are still regarded as such!
A total lack of understanding of how they work is a big problem,as far as audiophiles are concerned dml is just cone breakup and distortion!!!
When I go to an audio show,the quickest way to empty a room is to mention I use dml.
People suddenly start moving backwards towards the door,as if you've just broken wind!!!
Which is very possible ,now I'm getting older
Tectonic do have panels(if I remember rightly) that are pretty much full range (I have not looked for a while) say 100 hz to 20k or so?
This is also the sort of area I usually use my panels in,unless using the very small panels course.
The sound quality that you can get with dml can be exceptional .
It can also be very so so if the wrong materials are used.
I have shown that you can use pretty ordinary materials that are not expensive or hard to get and that perform very well.
Spending vast amounts of money on argon encrusted panels,is no guarantee of producing a better or improved sound.
There are limits to what certain panel materials can do,and once you understand this ,it makes life a lot easier.
I don't know if this answers all your questions ,but hope it answers some.
Steve
The uptake of manufacturers to produce quality dml panels has been disappointing to say the least.
I blame NXT (rightly or wrongly) for not producing the high quality panel to start with,instead they sold licences ,and they were mainly used as toys .
And even now they are still regarded as such!
A total lack of understanding of how they work is a big problem,as far as audiophiles are concerned dml is just cone breakup and distortion!!!
When I go to an audio show,the quickest way to empty a room is to mention I use dml.
People suddenly start moving backwards towards the door,as if you've just broken wind!!!
Which is very possible ,now I'm getting older
Tectonic do have panels(if I remember rightly) that are pretty much full range (I have not looked for a while) say 100 hz to 20k or so?
This is also the sort of area I usually use my panels in,unless using the very small panels course.
The sound quality that you can get with dml can be exceptional .
It can also be very so so if the wrong materials are used.
I have shown that you can use pretty ordinary materials that are not expensive or hard to get and that perform very well.
Spending vast amounts of money on argon encrusted panels,is no guarantee of producing a better or improved sound.
There are limits to what certain panel materials can do,and once you understand this ,it makes life a lot easier.
I don't know if this answers all your questions ,but hope it answers some.
Steve
you should be powerful,
my aim is for professional applications obviously with more exciters and panels.
As for the panels there are the aluminum honeycomb carbon composites, I will start with something inexpensive while waiting to find someone who can make or sell me a panel of at least 60 cm x 40 for 3-4 mm of total thickness. Your best bet would be to find something extremely stiff and thin that is inexpensive and readily available
my aim is for professional applications obviously with more exciters and panels.
As for the panels there are the aluminum honeycomb carbon composites, I will start with something inexpensive while waiting to find someone who can make or sell me a panel of at least 60 cm x 40 for 3-4 mm of total thickness. Your best bet would be to find something extremely stiff and thin that is inexpensive and readily available
Pixel1.
I pretty much covered this on the dml open baffle for pro sound use.
3mmm ply or hardboard(smooth both sides) works well and is cheep ,in the UK from various diy stores.
Rigidly mounting the panel in a solid frame stops the panel flapping about at low frequencies and also increases output slightly.
I did try a smaller panel size (about 30cmx40cm I think),but found the sound started to get very hard,not pleasant at all.
I would also expect say a 20mm thick xps panel to have the same problem if used too small.
It's a question of getting the size and thickness and stiffness correctly matched.
There is the question of how you are going to mount the exciter to the panel ,at about 200gm it is quite heavy,so presumably it will not be self supporting?
I mention this and the panel warping with time on the other site.
Steve.
I pretty much covered this on the dml open baffle for pro sound use.
3mmm ply or hardboard(smooth both sides) works well and is cheep ,in the UK from various diy stores.
Rigidly mounting the panel in a solid frame stops the panel flapping about at low frequencies and also increases output slightly.
I did try a smaller panel size (about 30cmx40cm I think),but found the sound started to get very hard,not pleasant at all.
I would also expect say a 20mm thick xps panel to have the same problem if used too small.
It's a question of getting the size and thickness and stiffness correctly matched.
There is the question of how you are going to mount the exciter to the panel ,at about 200gm it is quite heavy,so presumably it will not be self supporting?
I mention this and the panel warping with time on the other site.
Steve.
When you say maximise frequency response ,what is the response you are looking for?
You have purchased a very powerful exciter that will probably drive ply panels very well,my 10matters struggle to drive excessive volumes
I would think EPS 25mm 70 grade would only need a 10watt exciter to produce the same output as long as you don't drive it too low!
I would not rigidly mount EPS.
But I would not drive either without a sub of some sort.
As long as you are not playing close -miked recordings ,acoustic music should be ok,I think!
the reason I suggested ply or hardboard for pro work was the robustness of the panel coupled with a pretty decent sound .
Steve.
You have purchased a very powerful exciter that will probably drive ply panels very well,my 10matters struggle to drive excessive volumes
I would think EPS 25mm 70 grade would only need a 10watt exciter to produce the same output as long as you don't drive it too low!
I would not rigidly mount EPS.
But I would not drive either without a sub of some sort.
As long as you are not playing close -miked recordings ,acoustic music should be ok,I think!
the reason I suggested ply or hardboard for pro work was the robustness of the panel coupled with a pretty decent sound .
Steve.