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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.
Post Subject: Never say neverPosted by Romy the Cat on: 10/27/2011
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 Jorge wrote:
 I need to care just one octave at my 25Hz bump,

I have tried the same solution in a big room, the thing is that we not only got output at 25 hz, but a lot also at 50 hz! There was no way surgically cut it to what we needed and the result was it messed everything up. 
Jorge, I would leave your comment that there is “no way surgically cut it to what we needed” free for interpretation.” Anything can be done if person knows what he wants. Remind you that under 50Hz there is very difficult to generalize anything. You need to deal with given specific results, recognize and interpret the results and navigate sound to where you feel it has to be. You were in my old room and any audio-sane person that in that room it is impossible to get interesting bass. I think it was interesting, if so then why do you feel that in my new room I had settled for less interesting sound?

A few comments in context of your post. At sub 50Hz bass in not frequency but cloud. You cannot say that it is 43Hz unless you VERY much familiar with the sound of this given room at given location. So, I treat the conversation about sub 50Hz sound with some numeric abstractedness and roundness. Also, when I said about my bump I mentioned the location of the pitch but I did not said anything about the steepness of the bump. Of cause it has some spread to 50Hz but I would like remind you that I play much more delicate game. In addition to all bass requirement I have my midbass horn back-and-above and I need to let the ULF channels to inject some overtones from front. This effectively defeat the whole concept of ULF, converting it to regular LF but I use some tricks – my ULF are sitting at low end transition slope. The Midbass run down to 42Hz and ULF sits at 20Hz crossover. Then I add volume to ULF, making it sonically to sound properly, filling the small gap between 42Hz - 20Hz. So, for my midbass channel my ULF channels act as regular bass but for the rest of the system they act as pure ULF as it has more output at sub auditable region then regular bass channel would have, this what transition slope does. Add to this the defined using of non-symmetrical filters for right and left channels you might get a feeling that the LF I get in here is very much not accidental but very well controlled. I have very little accidental events in my Sound.

Rgs,
Romy the Cat

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