Mini models of the SDA SRS. i need help with crossovers.

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  • heiney9
    heiney9 Posts: 25,711
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    Chains, links and rods.
    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 | Galion TS P75 Pre | Holo Audio Cyan 2 Dac | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • Lerjebrink
    Lerjebrink Posts: 39
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    htiwetqtlcqs.jpeg

    Todays progress. Tweeters + wire are still left. And then there is one more speaker to do😅
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  • Lerjebrink
    Lerjebrink Posts: 39
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    I am thinking of making a YouTube vid about them when i am done, with all the details, could be fun for you guys to nerd on
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  • BlueBirdMusic
    BlueBirdMusic Posts: 3,136
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    When I first saw you thread, I wanted to ask "WHY?".

    Now, I admire your creativity, determination, and "PATIENCE" especially with people.

    This is an entertaining "PROJECT"!
    "Sometimes you have to look to the past to understand where you are going in the future"
    Harry / Marietta GA
    m9iutt1ly1yd.png
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  • Lerjebrink
    Lerjebrink Posts: 39
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    2g70zxv7b137.jpeg
    gr99x9jd0kgw.jpeg
    4beeau63susy.jpeg

    Electronic test. Works beautifully. Now it is time to solder up speaker number 2.


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  • skipshot12
    skipshot12 Posts: 2,163
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    That looks awesome.
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  • Lerjebrink
    Lerjebrink Posts: 39
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    w4s5pkyvbawf.jpeg
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  • xschop
    xschop Posts: 5,875
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    Epic. Where's the SDA IC cable?
    Don't take experimental gene therapies from known eugenicists.
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  • Lerjebrink
    Lerjebrink Posts: 39
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    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it
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  • Gardenstater
    Gardenstater Posts: 4,960
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    I feel like a lot of people are looking at those and saying how cool it would be to own something like that. Super job.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • xschop
    xschop Posts: 5,875
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    Lerjebrink wrote: »
    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it

    What is the center to center distance of the midwoofers?
    Don't take experimental gene therapies from known eugenicists.
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  • Lerjebrink
    Lerjebrink Posts: 39
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    xschop wrote: »
    Lerjebrink wrote: »
    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it

    What is the center to center distance of the midwoofers?

    Guessing about 140mm, not exactly sure right now
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  • Gardenstater
    Gardenstater Posts: 4,960
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    Might've worked still, for nearfield SDA.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • ptrooper
    ptrooper Posts: 769
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    Lerjebrink wrote: »
    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it
    You don't always have to set them up for critical listening. Don't listen to the naysayers. If they’re anything like the big boys, they will have a nice balanced sound within reason to some placement.. I would have liked to see an SDA cable, you could remove it later! How are they sounding?
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • Conradicles
    Conradicles Posts: 6,434
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    Those are purdy!
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  • VR3
    VR3 Posts: 29,752
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    In my random experiments I've found the sda channels add a little something regardless of the spacing but the closer to the stereo array the more narrow the sound and the farther away the wider more diffuse. There is a goldilocks zone where it works better than others but it is doing something regardless.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Conradicles
    Conradicles Posts: 6,434
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    I like the goldilocks zone quite well
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  • msg
    msg Posts: 10,650
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    Anyone got a spare KVA?
    I disabled signatures.
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  • heiney9
    heiney9 Posts: 25,711
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    Ok, so now there are just regular speakers. Not SDA's. Sort of lets all the air out of the balloon for me. Cool looking, but nothing going on with the sound. :/

    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 | Galion TS P75 Pre | Holo Audio Cyan 2 Dac | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • Lerjebrink
    Lerjebrink Posts: 39
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    heiney9 wrote: »
    Ok, so now there are just regular speakers. Not SDA's. Sort of lets all the air out of the balloon for me. Cool looking, but nothing going on with the sound. :/

    H9

    You must understand too, that i dont want to pay 400$+ for more components that maybe wont make a difference. Maybe in the future, who knows.
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  • Lerjebrink
    Lerjebrink Posts: 39
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    ptrooper wrote: »
    Lerjebrink wrote: »
    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it
    You don't always have to set them up for critical listening. Don't listen to the naysayers. If they’re anything like the big boys, they will have a nice balanced sound within reason to some placement.. I would have liked to see an SDA cable, you could remove it later! How are they sounding?

    They sound better than i thought. The tweeters are so crazy clean sounding.
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  • heiney9
    heiney9 Posts: 25,711
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    Lerjebrink wrote: »
    heiney9 wrote: »
    Ok, so now there are just regular speakers. Not SDA's. Sort of lets all the air out of the balloon for me. Cool looking, but nothing going on with the sound. :/

    H9

    You must understand too, that i dont want to pay 400$+ for more components that maybe wont make a difference. Maybe in the future, who knows.

    Still a cool project, one I don't have the talent to complete. Spending another $400+ wouldn't get you an SDA type presentation. If they sound decent or even if they don't, still a cool looking project.

    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 | Galion TS P75 Pre | Holo Audio Cyan 2 Dac | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul!
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  • xschop
    xschop Posts: 5,875
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    Lerjebrink wrote: »
    xschop wrote: »
    Lerjebrink wrote: »
    xschop wrote: »
    Epic. Where's the SDA IC cable?

    I decided to go without it. Many people in this thread told me that it would only work if the distance between the 2 rows of speakers are more or equal to ear-to-ear distance. So i scrapped the SDA cable. The tweeters are still 4 way tho.

    I have no idea if it would have worked with it

    What is the center to center distance of the midwoofers?

    Guessing about 140mm, not exactly sure right now

    You'd still get SDA-IACC with a slightly smaller soundstage width than a set of 2B's. At nearfield, it may be even more expansive, who knows. JAT

    Great vision and execution either way.
    Don't take experimental gene therapies from known eugenicists.
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  • ptrooper
    ptrooper Posts: 769
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    @Lerjebrink nice Nad amp, with great headroom 😎
    https://us.v-cdn.net/cdn-cgi/image/quality=80,format=auto,fit=scale-down,height=1600,width=1600/5021930/uploads/editor/aw/2g70zxv7b137.jpeg
    Make sure the speaker cabinets are completely air tight .
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • Lerjebrink
    Lerjebrink Posts: 39
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    233se2nbhgwh.jpeg
    Second one soldered.
    Now its time for dampening. Then the trim pieces on the outside
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  • SeleniumFalcon
    SeleniumFalcon Posts: 4,390
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    I sent Matthew a photo of your "air guitar" model and he responded:

    "Okay, I've been laughing ever since receiving this. Somebody has way too much time...."

    I explained to him your project of building a small sized replica of the SDAs. I'm sure he'll love it.
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  • SeleniumFalcon
    SeleniumFalcon Posts: 4,390
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    Matthew responded:

    "Kudo's to his model building skills. Looks faithfully to about 1/3rd or 1/2 scale. They could sound pretty good but will require quite a bit of tinkering. If the center to center distance between the low-mid drivers is still 6" - 9" SDA will work well. If the passive radiator is actually an active woofer keep the crossover below 100Hz. Does he have an idea how to wire the arrays and setup crossovers?"
    -msp
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  • skipshot12
    skipshot12 Posts: 2,163
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    Either way, damn friggin cool project 👍
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  • Lerjebrink
    Lerjebrink Posts: 39
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    r242uwfrzf9p.jpeg
    iqayei8nxa3c.jpeg

    They are soon done! Just the front and side panels left

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  • Lerjebrink
    Lerjebrink Posts: 39
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    SeleniumFalcon wrote: »
    Matthew responded:

    "Kudo's to his model building skills. Looks faithfully to about 1/3rd or 1/2 scale. They could sound pretty good but will require quite a bit of tinkering. If the center to center distance between the low-mid drivers is still 6" - 9" SDA will work well. If the passive radiator is actually an active woofer keep the crossover below 100Hz. Does he have an idea how to wire the arrays and setup crossovers?"
    -msp

    Wow!
    The mids are under 6” between eachother. So i went without IC cable on them.

    I wanted good bass, so i made the passive radiator like the original. And i am going to use a seperate 8 inch sub, so i can get ”good” bass.

    All the crossovers are finished and playing good,
    I am going to measure them up soon.
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