I have a speaker kit which i made the boxes for using there sizing
What i would like to do now is change the box completely . I want to make it narrower, taller & deeper but will keep the litres the same . can anyone see any problems . At least one measurement will be changed by 10 percent or more
Also change the ports from front to back of box . if possible put one next to other or one on top of the other .Can anyboby see any problems thanks
What i would like to do now is change the box completely . I want to make it narrower, taller & deeper but will keep the litres the same . can anyone see any problems . At least one measurement will be changed by 10 percent or more
Also change the ports from front to back of box . if possible put one next to other or one on top of the other .Can anyboby see any problems thanks
Assuming it is not a transmission line there should be no problems at all. The thing most likely to have an effect is the baffle width which relates to the baffle step correction in the crossover, but 10% change is certainly not significant.
cheers,
Paul
PS what kit would that be?
cheers,
Paul
PS what kit would that be?
The kit is the jv 60 from jaycar .I am rebuilding because I am sick of looking at the 2 ports in the front . could you please explain baffle correction how it will effect the box or the crossover .Is it a effect I am likely to hear
busterno1 said:
As long as you don't change the baffle width significantly the
sound will not change. Siting the ports on the back will sound
slightly better usually.
😉 sreten.
Just had a thought : keep the width similar but bevel the
edges at 45 degrees for a visually much narrower baffle.
🙂 sreten.
edges at 45 degrees for a visually much narrower baffle.
🙂 sreten.
thanks for the answers .
I was planning on rounding the edges off as well .
Is there a bad spot to mount the ports for ex directly behind a driver or too close to each other . mabey one directly on top the other ?
I was planning on rounding the edges off as well .
Is there a bad spot to mount the ports for ex directly behind a driver or too close to each other . mabey one directly on top the other ?
The JV60 box is not tall enough. Ideally, the height should place the tweeter on ear level when in your seating position. 900mm is usually about right for a normal couch, so the box should be taller, say 1150 - 1200mm tall. Tall and slim also looks better. If you place the vents on the rear of the box, you need clearance behind as if the gap is too small, the effective tuning of the vents will be lower. Don't worry about baffle width, the difference should be more theoretical rather than noticeable.
IMO the Jaycar box has very bland looking proportions. It is ridiculous to have to put a floorstanding speaker on a stand to get the right height as well. 210mm front baffle width looks about right for these speakers. But this may not help if you are only making minor modifications to an existing box.
What is the size of the box you have now?
IMO the Jaycar box has very bland looking proportions. It is ridiculous to have to put a floorstanding speaker on a stand to get the right height as well. 210mm front baffle width looks about right for these speakers. But this may not help if you are only making minor modifications to an existing box.
What is the size of the box you have now?
With ports the main thing you have to watch is the clearance around it. If it is very near the floor, then this will extend the effective length and you must allow for this. I'm not sure of the effect of placing the vents close to each other. Unless you can get a clear answer on that I'd avoid it.
As far as rounding the edges, I would consider that primarily an aesthetic change, rather than an acoustic one. It is commonly thought to reduce edge diffraction, but I don't think it is really effective. There is a relationship between the wavelenth of concern and the radius of the curve, which means that the radius you are likely to use is only going to work for the very high frequencies which tend to beam and have very little off axis output anyway. If you want to put on a grille, this radius becomes a pest, and personally I don't think the radius looks as good, but that is a matter of opinion.
regards,
Paul
As far as rounding the edges, I would consider that primarily an aesthetic change, rather than an acoustic one. It is commonly thought to reduce edge diffraction, but I don't think it is really effective. There is a relationship between the wavelenth of concern and the radius of the curve, which means that the radius you are likely to use is only going to work for the very high frequencies which tend to beam and have very little off axis output anyway. If you want to put on a grille, this radius becomes a pest, and personally I don't think the radius looks as good, but that is a matter of opinion.
regards,
Paul
at the moment the box is 275 w external .jaycar say it should be 223 internal .the 210 mm you suggest is close to what i wanted maybe a bit smaller [ internal i mean ]
The main thing is to keep the same volume. The Jaycar box isn't very well braced, especially considering the dimensions used.
Hi : )
I have had the jv60 kit sitting in my cupboard for the last 6 years waiting to be built.
I also wanted to change the design of the speakers in the same way you did and was wondering how you went with that project. Any help would be greatly appreciated.
Thanks
I have had the jv60 kit sitting in my cupboard for the last 6 years waiting to be built.
I also wanted to change the design of the speakers in the same way you did and was wondering how you went with that project. Any help would be greatly appreciated.
Thanks
Andrew, that's a long time to have it sitting there! You had the kit before I did!
I now have mine on an open baffle, and like the sound better, mostly for the sound stage.
What are you using now?
My old TL boxes are now collecting dust.
I now have mine on an open baffle, and like the sound better, mostly for the sound stage.
What are you using now?
My old TL boxes are now collecting dust.
i have since changed the box size & altered the port size 40ltr box single port .
cant remember port size will measure when i get home
Ended up going with a new X/O a series made a world of difference like having a new set of speakers
cant remember port size will measure when i get home
Ended up going with a new X/O a series made a world of difference like having a new set of speakers
Yeah it has been a long time and i'm feeling a bit guilty 🙁
They are still unused brand new in the original box.
Over the years i made all these grand designs but never built the cabinets for them.
Now i'm thinking just to narrow them slightly to 200mm and increasing the height to maintain the internal volume.
I'm also going to get a cabinetmaker to make them as i now have no tools and no time. Also i want a really pro finish. Was thinking of something like this. http://www.aadsound.com/products/Loadspeaker/c series/550-Big cherry.htm
They are still unused brand new in the original box.
Over the years i made all these grand designs but never built the cabinets for them.
Now i'm thinking just to narrow them slightly to 200mm and increasing the height to maintain the internal volume.
I'm also going to get a cabinetmaker to make them as i now have no tools and no time. Also i want a really pro finish. Was thinking of something like this. http://www.aadsound.com/products/Loadspeaker/c series/550-Big cherry.htm
I also got a guy to redesign the box yesterday and he came up with this.
35L 750H 200W 240D
1 vent at back 123mm
Also whats wrong with the old crossover?
35L 750H 200W 240D
1 vent at back 123mm
Also whats wrong with the old crossover?
try it you might like it . but i was never happy with it . the new one has much better bass improved mid. tamed the tweeter a bit
it showed what the drivers a capable of if you want pm me i will send the X/O & driver spacing to you
it showed what the drivers a capable of if you want pm me i will send the X/O & driver spacing to you
That would be awesome if I could get that info busterno1
I want to do the best job I possibly can with these.
However I cant PM as I am still under moderation.
I want to do the best job I possibly can with these.
However I cant PM as I am still under moderation.
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