GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Another time aligned 5-way horn project

Post Subject: Ok, get serious.Posted by Romy the Cat on: 10/20/2015

Murataltuev wrote:
What Macondo axioms are breaking with using GOTO 146 with 4" exit in say 150Hz Tractix ?Why you don't recomment to do it ?

Of cause not but did you read and understand the Macondo Axioms? The Macondo Axioms proclaims that an individual driver and individual channel have to be set in maximum suitable for own topology operation. According to Goto the 146 driver has high 20Hz resonance frequency. How will you be able to use it with 150Hz horn? Of cause you will be able to use it and of cause you will have an opportunity to cry that it was a “great tone” but in reality it would not be the optimum setting for this driver.

Murataltuev wrote:
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.

Murat, I juts would like to advise you to hold your enthusiasm for Soundex-type of community. Any quality does not come from component but from effort to make the components to function properly. You just discovered Gotos, dumped them in a random seating and cry about tone, while Goto never were especially great tonal drivers.

Murataltuev wrote:
I'm not on yout side blaming GOTO users who doesn't care much about time alignment. They have another priorities.

I am OK that you are not my side. The Goto community is a special breed of people, like iPhone users – it is religion that in many instances based upon amateur expectation.

Murataltuev wrote:
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 ?

I do not think that anybody advise you to “skipping such an incredibly great driver”. You can use anything you want but whatever you chose make a common usable sense of it. What kind help do you expect? So far you did not ask a single sensible question that would indicate to me that you are trying to do anything interesting. Get serious with what you do and do not spill to this site the infamous Soundex’s empty enthusiasm.

Murataltuev wrote:
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 50-300What is wrong with this configuration ?

If you willing to dedicate one Goto 146 for upper bass and one for midbass then it sound like a good idea. Let presume that you have 400Hz-600Hz MF driver as your base and the rest consecutive channels above. I am sure that you will eventually get rid of your JBL MF and go for a vintage solution but it will be later and to give 400Hz-600Hz as the bottom knee for your prospective MF sound like a reasonable idea. Now, calculate the space you would like to have for your upper bass driver. You need to know juts 2 parameters: exit of your upper bass driver and desirable sixe of mouth. Let juts for a sake of illustration you figure out that you can put 1x1M horn. That would allow you the MF to be at more or less reasonable elevation. The mouth would make let say 100Hz horn rate and if you go with fast opening profile then it will be 1.2M long. This will be time-alignable combination. Also, if you won’t be able to rife the Goto146’s Fs all the way up then you end up with 4” entrance horn and there are plenty of other drivers that you will be able to use. Now it is the time to model how you implement the upper bass horn. Be advised that if you go for 40H then you do not want this horn to shoot toward to you. Most likely it would be curved horn, so use your imagination how to incorporate it in your room. No one could do it buy you. If it as up to me then I would start from Upperbass horn and MF, then after I make the Upperbass and FM tandem to work properly in my room I would supplement it with a direct radiator bass channel and work on perfection of the upper horns. In my mind, looking at the questions you ask you are not ready to undertake the midbass project. You might return to it in a few month after you get a success with your upperbass horn.

Murataltuev wrote:
I've just realised why I have full orchesta in my room!

Oh, God! Are you on drugs?

Murataltuev wrote:
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.

You serious, this is the question you ask? Murat, spend some time reading this site. You will save a lot of time and effort to yourself.

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