Mini models of the SDA SRS. i need help with crossovers.
Lerjebrink
Posts: 1
Hi everyone! I am building miniature versions of my SDA SRS speakers. I would like to have some pro help in my project. I have ordered mid and tweeters, and i am going to design the crossovers now.
I don't even know where to start. Every calculator is for 2-way systems, but i want to include SDA in the speakers. I know that it is impossible to get it exactly right with these components, but i want to try to get it as close as i can.
Down below are some images of the original wiring scheme with all the component values, and also the new speakers/tweeters for my mini build, along with pictures of the original speaker/tweeter specs.
Please message me or answer here in the discussion.
I don't even know where to start. Every calculator is for 2-way systems, but i want to include SDA in the speakers. I know that it is impossible to get it exactly right with these components, but i want to try to get it as close as i can.
Down below are some images of the original wiring scheme with all the component values, and also the new speakers/tweeters for my mini build, along with pictures of the original speaker/tweeter specs.
Please message me or answer here in the discussion.
Comments
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OH BOY !!
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Step #1 - Order a white lab coat on TEMU.
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If you want smaller SDA speakers find a pair of SDA CRS+. Otherwise, you are wasting time and money.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
The front baffle of full sized SDA's play a part, not sure how'd you even calculate that. I'm sure you could make min-replica's after much time, expense and effort. But they will not sound anything...........anything like larger SDA's. They might not even sound good playing 2ch music.
What size passives are you using and how are you calculating the volume of the cabinet? How do you know your mini driver choices will even excite the PR enough to get the freq response nec? That's one of hundreds of questions.........
The drivers that create the SDA have to mathematically be positioned a certain distance apart. How wide is the front baffle on your mini's? Thats why CRS's are on their sides.
It's a waste of time and money
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul! -
The old SDA's are an acoustic experience. It can't be scaled smaller easily because certain physical parameters and ratios of those parameters are needed for the process to work effectively. SDA- CRS's are about the smallest you can go physically.
If this were an electronic issue it would still be difficult, but perhaps with enough knowledge, they could be scaled down to somewhat work.
Polk makes sound bars with an electronic algorithm (along with some physical attributes) that simulates the acoustics of SDA. Honestly my soundbar is like that, and it's not very convincing.
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul! -
I had to go back and look to see if this was posted on April 1st.
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul! -
As long as the centers of the MW drivers are the listener's ear-to-ear width, the IACC will be achieved.
Would be fun to see a full build thread here.
Welcome to the gauntlet.Don't take experimental gene therapies from known eugenicists. -
I recall a member built a homemade pair of very large SDA speakers years ago with MWxxxx drivers properly spaced. By all of the many accounts they sounded like crap.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
He's not using MW drivers and to me "mini" means smaller than CRS's.
I guess the OP needs to define what 'Mini" means. He's showing 2" speakers
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
