About to unleash the next sda srs beast

VR3
VR3 Posts: 29,383
in DIY, Mods & Tweaks
I tease you with this cheesy AI image

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- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,383
    The standard c coil versus the biggest they can fit in the machine

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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • pitdogg2
    pitdogg2 Posts: 26,915
    You using the big one on SDA's?
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  • VR3
    VR3 Posts: 29,383
    Yes, I've actually used it a couple other times but it's quite a bit more than the standard.

    I used it on the big duelund build a while back, worked very very well
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • pitdogg2
    pitdogg2 Posts: 26,915
    VR3 wrote: »
    Yes, I've actually used it a couple other times but it's quite a bit more than the standard.

    It meets all the parameters? What does it drop the ohms to?

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  • VR3
    VR3 Posts: 29,383
    edited June 26
    There's honestly not much difference, the dcr rating of the standard c coil is so low already, it's just a little bit lower.

    Similar, I can't recall what the set Sean's read at but I had no issues driving them with a tri Vista integrated to very high levels cleanly with insane bass.

    Polks directive on the sda inductor was the lower the dcr the better performance but harder to drive.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • pitdogg2
    pitdogg2 Posts: 26,915
    My 2.3tl's run about 2.5ohm at the post, crazy good with the Aragon..
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  • VR3
    VR3 Posts: 29,383
    Yeah the number 2.8 comes to mind
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,383
    Just finished wiring one up!

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    Another teaser for fun 😍
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • skipshot12
    skipshot12 Posts: 1,772
    **** teaser....
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  • VR3
    VR3 Posts: 29,383
    Ok ok one more

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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Conradicles
    Conradicles Posts: 6,322
    Wowsers!
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  • drop1
    drop1 Posts: 66
    Never seen a heatsink on an SDA XO. Cool B)
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  • pitdogg2
    pitdogg2 Posts: 26,915
    Mundorf resister needs a heat sink.
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  • VR3
    VR3 Posts: 29,383
    edited July 8
    I've installed path audio resistors to a heat sink and there are definitely performance gains, especially if you listen at louder volumes.

    I've found alot of benefits of using heat sink based resistors in parallel circuits as they tend to run alot hotter than series resistors.

    Most resistors will increase in value as they become hot. If you are ever listening and feel like your sound seems more dampened than the beginning that could be the cause

    Here's the slab of marble wood I cut up, planed and used for part of this build. I didn't snag a photo of the bubinga slab but both species is very difficult to work with.

    ptdmlb915lxd.jpg

    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • skipshot12
    skipshot12 Posts: 1,772
    I will 100% verify the above comment regarding listening at high, I mean high, volume at sustained periods, from personal experience I speak.
    The music starts to take on a transistor radio type of sound. The first thing you'll notice is bass impact will start to decrease the louder/longer you crank.

    This has nothing to do with an amplifier running out of juice, it's exactly what VR is saying. It's the heat build-up of components in the crossover that's the cause.

    Most folks will never experience this as most don't listen to their system this way. Most don't punish their system's like some of us do.

    It's a weird thing that all of a sudden you wonder what's happening, hard to explain.

    You eliminate these things when you don't build to a price point.
    Carry on (Sir) building these masterpieces and raising the bar.

    Skip
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  • VR3
    VR3 Posts: 29,383
    Thank you

    Also this eventually will cause resistors to drift in value permanently so if you experience this on a regular basis you should highly consider introducing a heat sink to the build
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • drop1
    drop1 Posts: 66
    Thank you- that's really helpful to have awareness of.
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  • VR3
    VR3 Posts: 29,383
    When I rebuilt my grandes, the difference in sound quality over say a 3 hour session at 85db nominal with a heat sink crossover versus normal was night and day.

    The composure of the sound stayed unchanged and using a temperature gun showed the resistors never went above room temperature even 3 hours in.

    On the opposite side of the spectrum, the parallel resistors for the midrange were burning the substrates of the oem crossover.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,383
    edited July 8
    Tweeter network
    Clarity cmr
    Clarity csa
    Path audio and mundorf resistors
    Jantzen inductors
    Supra rondo

    Mid /sda
    Clarity cmr
    Clarity csa
    Jantzen inductors and 12 awg c coil
    Supra rondo

    Point to point wired
    Marble wood and bubinga substrates, backed with mdf and laser cut
    Supra quadrax sda cable
    Wbt binding post

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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,383
    More pictures

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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Conradicles
    Conradicles Posts: 6,322
    Once again, another work of art.
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  • VR3
    VR3 Posts: 29,383
    Thank you 😁
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • jdjohn
    jdjohn Posts: 3,315
    Pretty work. I hope you're using audiophile zip ties :D
    "This may not matter to you, but it does to me for various reasons, many of them illogical or irrational, but the vinyl hobby is not really logical or rational..." - member on Vinyl Engine
    "Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
    Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
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  • skipshot12
    skipshot12 Posts: 1,772
    Absolutely gorgeous work.
    Would love to hear these installed.
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  • VR3
    VR3 Posts: 29,383
    Thanks guys!

    I store my zip ties in the freezer to improve performance!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • machone
    machone Posts: 1,551
    Looks great!
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
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  • halo71
    halo71 Posts: 4,628
    I'm just speechless! Wow! Awesome work!
    --Gary--
    Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out.
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  • BlueBirdMusic
    BlueBirdMusic Posts: 2,735
    kqca9m2sodq4.png
    "Sometimes you have to look to the past to understand where you are going in the future"
    Harry / Marietta GA
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  • VR3
    VR3 Posts: 29,383
    Thanks everyone! I'll send a video of them playing this weekend 😁
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Viking64
    Viking64 Posts: 7,502
    edited July 11
    Sign me up for the SDA SRS Beast® Road Test.
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