Minimum spacing
The highest crossover frequency you can use when lambda <= 13520/ crossover frequency.
Therefore if you choose 2000 hz as your crossover point then the maximum separation between tweeters centre to eithers woofer centre is 6.7 inches.
Keep the distance from one woofer to tweeter equal and same goes for the other.
Check out my design, it shall give you some insights
good luck
The highest crossover frequency you can use when lambda <= 13520/ crossover frequency.
Therefore if you choose 2000 hz as your crossover point then the maximum separation between tweeters centre to eithers woofer centre is 6.7 inches.
Keep the distance from one woofer to tweeter equal and same goes for the other.
Check out my design, it shall give you some insights
good luck
Attachments
Off axis Vivek?
Vivek I am worried about the off axis response at 2500 Hz!! it is rolling off rapidly.
I wont cross it over 2100 or 2200 hz?
what is the Fs of ur tweeter?
Vivek I am worried about the off axis response at 2500 Hz!! it is rolling off rapidly.
I wont cross it over 2100 or 2200 hz?
what is the Fs of ur tweeter?
Off axis
Dear Vivek,
Off axis response is one of the key factors a designer should be concerned.
If a speaker doesnt have good off axis response then the you will hear PEAKS AND NULLS AS you move around the room pr the spot.
Good off axis response eliminates THE NEED FOR A SWEET spot!
Sound needs to be spacious, all around us! thats why manufacturers publish 30 degree as well as 60 degree off axis responses.
Plz email me your cabinet dimensions, driver placement, centre to centre tweeter and woofer distance, FRD and ZMA files and I will do the crossover for you
Rock on
Himanshu
Dear Vivek,
Off axis response is one of the key factors a designer should be concerned.
If a speaker doesnt have good off axis response then the you will hear PEAKS AND NULLS AS you move around the room pr the spot.
Good off axis response eliminates THE NEED FOR A SWEET spot!
Sound needs to be spacious, all around us! thats why manufacturers publish 30 degree as well as 60 degree off axis responses.
Plz email me your cabinet dimensions, driver placement, centre to centre tweeter and woofer distance, FRD and ZMA files and I will do the crossover for you
Rock on
Himanshu
FRD and ZMA? I suppose you mean from Speaker Workshop. I do not have a jig made yet. The other measurements I can give you soon. What XO frequency do you suggest for the Vifa TC18 and D27?
Vivek
Vivek
FRD ZMA
Vivek jee,
Every program be it MLSSA, SW/ CLIO accepts files only in FRD and ZMA format only!
They are basically text files. I hope you have seen em.
I assume u bought your drivers from Corrsson, ask em for the SPL and Impedance plots in TEXT FILES ( laymans language). They are actually called as
FRD files: for frequency
ZMA : for impedance
Email me the files, and ur crossover is done in 7 hours gross!
Rock on
Vivek jee,
Every program be it MLSSA, SW/ CLIO accepts files only in FRD and ZMA format only!
They are basically text files. I hope you have seen em.
I assume u bought your drivers from Corrsson, ask em for the SPL and Impedance plots in TEXT FILES ( laymans language). They are actually called as
FRD files: for frequency
ZMA : for impedance
Email me the files, and ur crossover is done in 7 hours gross!
Rock on
Crossover frequency
Vivek,
let me know the centre to centre distance between tweeter and woofer.
I assume that the DISTANCE FROM THE UPPER WOOFER TO TWEETER = TWEETER TO LOWER BEFORE. Again centre to centre.
This is very important, plz update me
rock on
Himanshu
Vivek,
let me know the centre to centre distance between tweeter and woofer.
I assume that the DISTANCE FROM THE UPPER WOOFER TO TWEETER = TWEETER TO LOWER BEFORE. Again centre to centre.
This is very important, plz update me
rock on
Himanshu
Oh yes. I have seen FRD and ZMA files when I was checking out Speaker Workshop. But to get the impedance plot as a text file, I will have to measure the driver, right? I will ask Corrson if they have it. That will make things a lot easier.
About the distance, I want to crossover at 2500Hz. So that will need about six inches (which is what I plan to keep) between the centre of the woofer to the centre of the tweeter.
Vivek
About the distance, I want to crossover at 2500Hz. So that will need about six inches (which is what I plan to keep) between the centre of the woofer to the centre of the tweeter.
Vivek
Hi,
you might want to take a look at the following article:
http://www.birotechnology.com/articles/VSTWLA.html
Cheers,
BK
you might want to take a look at the following article:
http://www.birotechnology.com/articles/VSTWLA.html
Cheers,
BK
Hi,
I have calculated a centre to centre distance of 5.2 inches corresponding to 2600Hz, which is the crossover frequency for my MTM projec. Now, I have to move the tweeter about 5cm to the side so that the 5.2 inch criterion can be met. Is this okay?
Vivek
I have calculated a centre to centre distance of 5.2 inches corresponding to 2600Hz, which is the crossover frequency for my MTM projec. Now, I have to move the tweeter about 5cm to the side so that the 5.2 inch criterion can be met. Is this okay?
Vivek
Hi,
Can anyone tell me how low the Vifa D27TG-05-06 can go. I was suggested an XO by a friend and he suggests 2100Hz as the crossover frequency. Can the D27 go this low? I am making an MTM system with the D27 and Vifa TC18WG48.
Thanks,
Vivek
Can anyone tell me how low the Vifa D27TG-05-06 can go. I was suggested an XO by a friend and he suggests 2100Hz as the crossover frequency. Can the D27 go this low? I am making an MTM system with the D27 and Vifa TC18WG48.
Thanks,
Vivek
Vivek said:
Traditional wisdom states that you don't go lower than twice the Fs, but that's with a 2nd order crossover. With a 3rd order you can safely go Fs x 1.7, with 4th order Fs x 1.5 and with 5th order Fs x 1.2 is OK. State of the art HF protection with minimum parts cost is 3rd order LP/5th order HP.
Hi,
The one which has been designed is a Linkwitz Riley with a 4th order acoustical roll off.
Is there any site I can read about these theories.
Vivek
The one which has been designed is a Linkwitz Riley with a 4th order acoustical roll off.
Is there any site I can read about these theories.
Vivek
Hi,
Any comments on the 4th order acoustical LR? The electrical seems to be a 2nd order one.
High pass= C= 6.8 uF, L = 0.50
Low pass= L = 1 mh ( including BSC). C= 8 uF.
Vivek
Any comments on the 4th order acoustical LR? The electrical seems to be a 2nd order one.
High pass= C= 6.8 uF, L = 0.50
Low pass= L = 1 mh ( including BSC). C= 8 uF.
Vivek
A driver or speaker rolls off at 'x' slope, such as a sealed's 2nd order. Add a a 2nd order electrical at the right point and they sum to be a 4th order acoustic.
GM
GM
As far as protection is concerned all that matters is the electrical slope. The latest source on this is the Journal of the AES where Neville Theile- yes, that Neville Thiele- wrote about high order crossovers about a year or so ago. His current preference is for 3rd order LP/5th order HP at just above the tweeter Fs.
It isn't just how much information is being played that's over Fs, but rather how loud/low the tweeter can go without going outside its linear excursion limit. It's a lot easier to figure out where to cross if you know how loud you want your music. If you play music at 70dB you could cross at Fs x 1.1, if you wanted to.BillFitzmaurice said:
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