Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Mid-bass Hornresp (V51.30) simulations
Post Subject: Depends....Posted by Romy the Cat on: 7/6/2021
 koh123 wrote:

     If there is one thing that I have learned in life, and heard many times,  is that making a mistake is not a bad thing if you learn from it. In addition the lesson learned is just as valuable if you learned it from someone elses mistakes.  And the beauty of learning from someone elses mistakes is that you didn't have to put any work into making that mistake.
I few things about mistakes. Also, I would generally agree with what you say but in context of horn audio very few people have luxury or perseverance to define things as mistakes. Typically we do what we feel it right and then live with consequences, defining it as success. Many of our project are one in a life and we in most cases have no options to take alternative way.   
 koh123 wrote:

I already know what I want, a 4-way horn loaded active XO system. 
You know that the number of horns is a very similar to the size of your boat. You always feel that if you have 1-2 feet more then you would be happier… 
 koh123 wrote:
I know were I want my crossover points to be (2-3 octaves each horn).  I know that bass horns should be hyperbolic or exponential, midbass tractrix, midrange tractrix, tweeters exponential. I'm aware of the problems with the physical arrangement of horns and time alignment and therefore are going to use DSP. The mistake I did not want to make was picking the wrong dimensions for the midbass horn.  
Generally, it is not accurate objectives as if you combine physical arrangement with DSP then you juts confused. If you do use DSP then you should not be worry about physical arrangement at all and your entire design objectives would be very different.
 koh123 wrote:
 According to John Inlow his 4-sided 19" diameter horn he states "Drum snaps are crisp, but slap bass guitar is especially striking. There's an accentuation, a thrust if you will. I couldn't wipe the grin of my face if I tried. Effects like lightening (hard to get a real slap of thunder in older recordings) are much more believable" 
I do not know what John you are talking about. The rate of MF hone mostly derives from the lower cut of off your MF driver and you desire to drive it too much atop or too much at bottom. I prefers to be at the save region of the bottom but it would depend from many many different factors.
 koh123 wrote:
 And according to Jorge in this thread his round 36" diameter horn he states "sounds better, more lively and effortless, the system with the 140 hz is still fantastic and still alive but size does matter, and where you will really notice the differences will be when you play a big orchestra and get better definition of instruments in that range" 
Jorge’s comment if not definitive, might be true only in context of his system as there is a lot of depends. Yes, rise matters but it will be all depends how you implement the midbass channel. If the top of your midbass is better, then bottom of you upperbas hone then all bets are off. The 36" is the elevation of your ears what you seat, plass-minus. You cam make 46” upperbass horn then MF will be firing to you from above in nearfield.
 koh123 wrote:
 Lets now talk midrange horn for a moment.  I am going to follow the JBL 2446 tractrix midrange with a EV T350 (1" compression driver) at about 4-5K XO what do you generally advocate the midrange mouth diameter to be?

Sorry, I do not know 2446 driver. The T350 is very interesting beast and you can get from it any sound you want, it all depends how you use it and what you want from it. To know it you need to know what your MF driver does atop of own range…

Rerurn to Romy the Cat's Site