I strongly suggest not using a 15 inch driver for a mid-woofer. From 100, you would be far better off with an 8 even for PA use, a 4 or 5 in in a home. You will not be happy with the 15's ability to be smooth clear up to 500. Yea, even a high priced JBL. I would only use a 15 BELOW 100 Hz.
Now to your question:
The box you show is tuned for an F3 of 55 Hz. If you intent to cross it over at 100, you can use a much smaller box. May I assume this is some kind of PA system?
Now to your question:
The box you show is tuned for an F3 of 55 Hz. If you intent to cross it over at 100, you can use a much smaller box. May I assume this is some kind of PA system?
thanks buddy
actually it's going to be used in a horn speaker. the 15" will be in used from 100hz - 500hz behind a 100cm horn
I see the attraction for efficiency, but I still caution about the smoothness of a 15 as high as 500. I don't have fond memories of speakers like this. They were common in the '60s. VOT for example. They are still quite common for PA systems where very high SPL is required. To my ears, it is still a poor design choice because the cone just will not behave as well as you would want. For a PA, I would use 4 8's in a line array over one 15 any day. In all fairness I have not had the money to see if drivers like the AE TD15 really can behave the way you are wanting. $300 each is a lot to just see as I have no use for a system like that. Even they don't publish a chart. One thing I do believe, the AE can go down as far as you need it, so if that is you main woofer, you don't need subs. Don't want to sound like an add, as I have no relations with any company, but notice AE does make versions of their 8 and 10 specifically tuned for horn use.
thanks buddy
actually it's going to be used in a horn speaker. the 15" will be in used from 100hz - 500hz behind a 100cm horn
You're welcome!
Then depending on the horn's design and application, it may not be a good alignment.
GM
Like the JBL Everest, you mean?
It's all about the implementation.
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Like the JBL Everest, you mean?
Altec Voice Of The Theater, not to mention things like Hartly, JBL PA's used in houses and others. I just don't like my cones to be flopping in the breeze. It is all about that " perfect piston" mythical goal.
I will grant you some progress has been made in cone shape, small advances in paper, and some advances in doping materials. Small. These are things that were understood in the '50's. Read AES. Unfortunately, we still just can't make them. What we CAN make is far better motors and suspensions that allow greater Xmax while keeping the distortion in check. An 8 may just do a lot better now even though it is moving five times as far.
Another thing we have now is very very good amplifiers. OK, even I have a 8W tube amp, but it sits on my shelf looking cool. I prefer my Parasound 1200's. My smallest amp is a 30W Creek and it is for background music. I remember when 30W was awe inspiring.
For residential use, direct radiators of upper 80's efficiency do very well. PA use is totally different. You need the 90's. I may prefer a line array of 8 8's with a monster amp, but I can see the attraction of a single mid-bass horn that won't dim the lights. What I just don't see is using a 15 in it.
Summarizing, taking all things into consideration, I don't think a 15 is the best for this application. It might have been 40 years ago. There is no one right answer, a few wrong ones (4 inch subs) and about as many in the middle as there are people who ever built a speaker. It takes a lot of thinking about all the tradeoffs working together. I have seen so many speakers built that maximize one parameter, but the end result is terrible. Bose, Klipsh, Walsh, and the list goes on. The reason for horn loading is efficiency. That gives you both lower harmonic distortion and higher SPLs, all things being equal. All things are not equal in the behavior of the cone. Build both and let us know.
Uh thanks for the tip, but I'm just like Alies in Wonderland when I open Hornresp
is there any specific thread about this software?hornresp thread. You are not allowed to ask any questions before reading the whole thread . Just kidding .
It is not as difficult at it seems when you start. Hornresp for Dum... hmm... Everyone
. It is not as difficult at it seems when you start. Hornresp for Dum... hmm... Everyone
hornresp thread. You are not allowed to ask any questions before reading the whole thread . Just kidding
It is not as difficult at it seems when you start. Hornresp for Dum... hmm... Everyone
Uh thanks a lot
seems my first post would be some years after next ice age I should read all the post before thatWe probably disagree on the best (or just reasonably effective) current ways to meet the same goals, but it doesn't matter here because I misread the OP's post - I was thinking this was a direct-radiating 15" handing off to a midrange horn at 500Hz. Now I see it's supposed to be a 100-500Hz front-loaded mid so... yes I agree with you, and sreten, and more10.
what if use it in a direct radiating cab and use DCX2496 to cross the lows to do some +db or just turn up the woofer amplifier to meet the higher efficiency of HF section (~110db/w/m)?
or
what if we use this 15 incher from 100hz - 300hz and let the rest top to the hf? Radian 950PB is capable to be crossed at about 300hz in a home use as micro watt amps could be used. am I wrong?
Horn loading from say 400 Hz and up is quite difficult with cone drivers. You will also need to take care of baffle step fenomenon, around 300 Hz that is. Myself I am planning to use a straight 180 Hz horn with a compression driver from 300 to 2,5 kHz. Ready made horns of this size are available from DIY-soundgroup if you don't want to make them yourself. Possible drivers are Radian, JBL cores with radian diaphragms, JBL with phenolium diaphragms and BMS. The Radian driver has an exit angle that isn't optimal for this kind of horn though. Go for the BMS if you have the money, else JBL with Radian diaphragm.
Below 300 cone drivers are the only option for horn loading, but they will be very big. They will sound better than any other enclosure in my opinion, but you need the space. If you don´t have the space you will have to figure out something else.
What is the 15 inch you have?
Below 300 cone drivers are the only option for horn loading, but they will be very big. They will sound better than any other enclosure in my opinion, but you need the space. If you don´t have the space you will have to figure out something else.
What is the 15 inch you have?
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