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In the Forum: Horn-Loaded Speakers
In the Thread: Another time aligned 5-way horn project
Post Subject: Any interest to help ?Posted by Murataltuev on: 10/20/2015
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 Romy the Cat wrote:
 
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. 
What Macondo axioms are breaking with using GOTO 146 with 4" exit in say 150Hz Tractix ?Why you don't recomment to do it ?

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. 
Any system is a set of compromises. The one thing where I don't want compromise is drivers tone! I've found driver with the right tone.I'm not on yout side blaming GOTO users who doesn't care much about time alignment. They have another priorities. But, of course, will be great to time-align if possible. But skipping such an incredibly great driver, because of the alignment problems is definately not my way.Romy, may be I'm wrong to expect some help from you. I read here in some thread you told that will be happy to help to someone with this GOTO 146. May you had interest at that time and don't have it now. Don't you have any interest to help me to proper implement system with this driver ?
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. 
160Hz is just 60x60sm and 0.5m long. For sure I'll find some way to time-align. May be I'll skip fundamental channel and my upperbass will go till 1000Hz.In this case configuraion will be as follows:1. RAAL 14k+2. JBL 245X 1200-14k3. GOTO 146 300-12004. GOTO 146 50-300
What is wrong with this configuration ?
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. 
I've just realised why I have full orchesta in my room! GOTO has a hole in the back chamber. May be it works like port ? I'll measure SPL of this port today.And see what happens when I close it.
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. 
Romy, believe me, I have very good ears. I don't need measurements to say what is wrong with SPL. I immidiately recognize if anything wrong with timbre. And I have very exact knowledge what is good tone.But my expirience in listening horns is very limited. And this expirience is very important, of course. Hope to listen more systems around the world to understand where am I with my system.

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