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In the Forum: Horn-Loaded Speakers
In the Thread: Another time aligned 5-way horn project
Post Subject: Hm.... OK....Posted by Romy the Cat on: 10/19/2015
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 Murataltuev wrote:

What will be your suggestion for upper bass channel using compression driver ?

I do not use compression driver for bass channel. I would like to have my system esthetically balanced, to get let say 120Hz from a compression driver would take too long horn and it would be no way time-aligned it. So, I use "proper" regular drivers but mount then as compression.  That what I would recommend. What I do is not an accident but outcome of many experiment and thinking. For sure the conclusions serve my priorities, your priorities might be different.  Still I did not see any sensible solutions for upperbass with a compression driver that allow a proper implementation user the umbrella of Macondo axioms.

 Murataltuev wrote:
I have no simple way to time-align with mid-bass horn...

That is why most of the people do not do mid-bass horn with compression drivers. People go for mid-bass horn not because they bought drivers but because they find a way to alight and integrate the monster horns in their listening space.
 
 Murataltuev wrote:

Do you think that GOTO 146 is not capable to produce right upper bass in say 110-160Hz Tractrix ?

You are confused. A driver is very irrelevant thing in this subject. 110Hz in Tractrix is around 48" mouth. Can you accommodate it in context of your horns stuck? I do not know what the exit of your GOTO 146 but if it is 4" then be prepare to align 4" of horn length. I know the Goto users and makers do not believe in time alignment but that is why do not take them seriously.
 
 Murataltuev wrote:
I've just realised, that this is not a bug!
Looks like this horn doesn't work after 200Hz, so it is drivers own SPL rising higher than horns equalizatoin.
So, this sound after 200Hz must be removed by crossover or as I understand, making horn longer will increase the bandwidth of equalization and this drop can be removed. But the question is - do I need it ? May be crossovering is right way.Any opinions on this ?

That is exactly the definition of bug. Anyhow, if you are right then it look like your Goto driver has too soft suspension for 40Hz and you would need to tighten the back chamber  and to drive the resonance frequency all the way up.
 
 Murataltuev wrote:

Thank you for the link!I'm completely with this statement:
"...SG146LD is the only compression bass driver which does not produce boom-boom if fed right. The SG146LD contrarily is on first impression not to be heard as bass, first you think, hey it is wrong, it is not connected, but then you realize, what they are doing, they integrate completely homogeneously into the sound, totally natural, like a royal soufflé, no more "cuts" between bass and mid-range (especially in the voices), just "one" sound. Marvellous. Really marvelous..."
I said exactly this words after first impression: no bass, just right tone of lower octaves!
This is really amazing!

 
Well, I would leave the Reinhard and Kaluss alone. But what I do assure you with very high confidence that from what you described and how you use your horn with GOTO I conclude that your Goto channel not even remotely close to be used properly. The fact that you so excited with very much accidental use of a compression driver and a random horn is a bit alarming to me. 

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