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A Study of DML's as a Full Range Speaker
A Study of DML's as a Full Range Speaker
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Old Yesterday, 08:02 PM   #1721
bradleypnw is online now bradleypnw
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Join Date: May 2019
Quote:
Originally Posted by gapmedia View Post
Hi bradleypnw. Are you using REW for the above? I'm not (that) familiar with HolmeImpulse if you're using that, as 'dbjohns' mentioned. I tend to use REW for measurements, DRCDesigner to play with DSP/DRC, and then playback through JRver to test measurements and implement any DSP/DRC. Not saying these are the best software to use, just don't cost that much (some free) and work well for me.

I have started to look into room diffusers and bass traps, but these really have a low WAF. But in the end, would probably, in terms of performance increase be worth the grief.
I use REW for equalization. If you build a DML you probably won't need room diffusers because DMLs solve room reflections above the Schroeder transition frequency due to the type of soundfield they generate.
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Old Yesterday, 11:55 PM   #1722
spedge is offline spedge  United Kingdom
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Join Date: Sep 2009
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Originally Posted by bradleypnw View Post
I use REW for equalization. If you build a DML you probably won't need room diffusers because DMLs solve room reflections above the Schroeder transition frequency due to the type of soundfield they generate.
I'm glad you used the word probably,all panels that I know of ,use a primary drive area to drive the dml mode ,my exciters have a 1inch voice coil plus the foot mounting ,and the coil drives the area outside the coil to some extent ,I have not measured this but at a guess depending on materials ,the drive area could be about 2inches ,this can easily be measured by moving a microphone across the panel .
So basically you have a 2inch full range driver in the middle (or whatever you put it) of your panel,this is a pulsed direct radiator,not dml,the dml comes after.
I have mentioned this over the years ,but it seems to be ignored for some reason?
There is also the problem with the tin can effect,but i will not go into that now.

If like me you have a narrow room , reflections will sometimes give a false impression of a harshness in say the vocals,in the past I have spent ages trying to cure a problem I never had,it was only after playing the offending piece of music over and over again while playing around with the panel,that I realized it disappeared when i was up close to the panel,now when I hear what can be a painful noise ,I just turn my head to one side so that my ears are not receiving the full blast from the walls and ceiling and hey presto it is gone.
A panel can never (unless someone can show otherwise) be 100% dml, how much dml and how much postonic(oh no not again) depends on material (flexibility).
I think that's enough for now,just thought I'd mention this.
Steve

Last edited by spedge; Yesterday at 11:57 PM.
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