Blog Forums DIY Speakers and Subwoofers CSS Sdx12 Build

last updated by 123toid 1 month ago
2 voices
23 replies
  • Author
    Posts
    • #13336
      123toid
      Keymaster

      Here are a few pictures and videos of the CSS SDX12 build.  

       

      Pictures of the SDX12 and comparing it to a typical 12″ woofer



















    • #13343
      123toid
      Keymaster

      Build Video:

      Thoughts: coming soon.


    • #13445
      GrumpE1
      Participant

      Sir, you didn’t ring the bell on this one…. you knocked it out of the tower! My head  has been spinning with ‘which one and what will do…’ so many options, sizes, the qualities of each variation… looking at folded & tapped, yadda yadda… This little honey is spot on what my little room cries out for. It’ll be a while before I have the bank to drop (property tax season hear in the North East) Anyway, no more hunting… this is it!  and for a cherry on top… I stumbled upon an Audioholic review of the sealed flat pack… Golden 😉  … now which amp…lol

    • #13451
      123toid
      Keymaster

      @grumpe1

      I am glad to hear that.  I actually unhooked my ISO 100 and amp only running this in my theater right now.  With the passive radiators, it will shake the new theater seats.  Even then, it is so quite.  I have ran this with both my inuke 6000 (older generation) and my crown xti2002.  They both handle it really well.  But I do throw a 4th order high pass on at 20hz, just to protect it. 


    • #13593
      GrumpE1
      Participant

      A little off topic, but what gauge cable are you using for the CSS sub and how long is the run?  … and did you use speakON connectors, or post/banana plug? 

    • #13601
      123toid
      Keymaster

      @grumpe1 

      Sorry this took a few days to get back to you.  I have been on vacation.  Still will be, but I wanted to answer this quickly.  I am using 12ga OFC from monoprice. I do use these speakon connectors. There are cheaper, but these are just the best I have used, so why do anything different? THe length of the run is about 10ft.  Although, when I move my equipment, I foresee that run being significantly longer.   


    • #13617
      GrumpE1
      Participant

      “Sorry this took a few days…”

      No worries… kind of you to reply during. Hope the vacation was all you’d hoped for.

      I pulled the trigger… almost…lol. Have been learning about room calibration, along with bass management… I’ve opted for two of the sealed units, rather than one passive radiator.

      The living room is the listening room, is my theater room. There’s a 75″ open arch on one wall, an open doorway into the kitchen where the eat in counter is open… So odd/open as the layout is, having two subs seems prudent.  Also, two 14″ cubes will be easier to place…much easier! 4″ more for the passive unit didn’t seem like much till the measuring tape came out.

      For an amp, the Behringer NX6000D’s been purchased. I liked the crown series much better, but the cost difference coupled with the ascetics. The Behringer will blend in with the HTPC & AVR. The unit is overkill for my needs… so it should provide a clean signal being used so far below it’s capacity. They have a history of quality issues, and noise… but I’m ok with upgrading a fan or making an exchange if needed.

      So, the almost part of pulling the trigger… the amp is here, one kit is on the way… and it’ll be next month before I order the second kit & amenities. I’ll post again in a few months and let you know how much plaster comes down 😉

      Thanks for the inspiration!

    • #13621
      123toid
      Keymaster

      @grumpe1 

      That sounds excellent!  We just had the CSS SDX12 in a subwoofer competition, I won’t give anything away, but I will say it did very well.

      Interestingly enough, I used to power my CSS SDX12 with my old inuke 6000 non dsp.  Works great for that subwoofer.  But the crown cti-2002 took over.  However, I am now using that for the mx15, so the inuke might power it once again.  We will see. 


    • #13866
      GrumpE1
      Participant

      One down and one more to assemble! Had wanted to do a different finish, but after deciding to put SoundPath feet on it… the budget wouldn’t cover veneer. In any case, that Duratex is impressive. Way better than I’d anticipated… and even made some aesthetically pleasing cables to keep it all looking semi pro…lol. It’s just 10ga zip cord with a sleeve over it… but damned if it doesn’t look good. A royal PITA to get that sleeve over it though.



      To be continued….

       

    • #13868
      123toid
      Keymaster
    • #14028
      GrumpE1
      Participant

      It’s the twins Birthday!

      My bouncing bundles of joy sprang to life at a mere 75lbs each. Hungry little devils, but the NX6000D feeds them all they can eat…lol

      Couldn’t hear them, couldn’t hear them… then realized the floor was vibrating as was my chair. Reversed polarity, shifted them about a bit… and now my face hurts from this stupid grin I can’t shake.

      Took a que from your post, and set a 4th order L/R at 20hz. Did as CSS recommended and put a 6db boost centered at 25hz, Q=1… and put a 1200 watt limit on there… for now 🙂

      Soup to Nuts, $1800. That’s both kits, amp, SVS feet, 50′ 10ga cord and amenities…

      Mr Toid, Thanks! couldn’t have asked for a nicer kit, or better people to do business with. CSS and their beastly drivers will long have a place in my home… along with my clones 😉

    • #14036
      123toid
      Keymaster

      @grumpe1 

      Those look excellent! I’m happy to hear you are enjoying them.  To me the CSS SDX12 is the best sounding 12″ sub I have heard.  I haven’t heard it in a sealed box though. What are your impressions so far?


    • #14047
      GrumpE1
      Participant

      First Impression: They don’t sound like subs…. My old sub just boomed, and there was no mistaking the mud it contributed when there wasn’t boom. These Sdx12’s extend the sound down. They just bring all this new sound to the room. Clean & articulate. My mains go 30-20k, and are weak at the bottom. I found leaving them set as Large, and low pass at 100… integrates soooo smoothly for movies. Seamless!

      14″ cube is perfect for my needs. Even 18″ boxes wouldn’t have worked. For space & budget constraints, I don’t think better could be had.

      First impression of the NX6000D is very positive. For a budget amp, it does just fine. The NX software is a god-send. The little screen on the amp would have me cross eyed, but open up NX Edit and it’s all there on the big screen to tweak and set as you please.

      The noise isn’t half bad either. I’ve gone to great lengths to have NO fan noise out of my HTPC, so the Behringer will get upgraded but there’s no urgency

    • #14107
      GrumpE1
      Participant

      Prior to assembling these kits, I’d looked on youtube for a clip just to get some insight. The kits straight forward, but I find it helpful to see how someone else approached it. There wasn’t anything, so I broke out the recorder.

      I’m better at doing than talking, so you’ll hear me call the braces: baffles, and likely other errors. If you can look past my fumbling words… you’ll get a glimpse of what the assembly process looks like.

      Anyway, one clip is the assembly of the box. Another is how the driver & box were mated, and a third installing the SoundPath feet. By no means is this a ‘how to’ it’s just sharing my journey.

      assembly
      https://youtu.be/MNlq1uP1CbQ

      driver install
      https://youtu.be/0e9g_hEr040

      SoundPath
      https://youtu.be/Dxb87NInADQ

      • #25393
        123toid
        Keymaster

        @grumpe1 BTW I completely agree with you, they don’t boom, they just sound great. I really love the SDX12. And thank you for the assembly videos. It’s been almost a year, how are you still enjoying them?


      • #26543
        GrumpE1
        Participant

        Hi Ya Toid!

        “…It’s been almost a year, how are you still enjoying them?”

        A few months late to reply… and far too long since I’ve been here to enjoy the company of good audio folk & yourself.  Since finishing these subs and getting my Denon X3700… I’m not spending so much time on the web. Instead, busy enjoying the system albeit with movies or music.

        The subs continue to impress me. There’s no replacement for displacement when it comes to chest thumping bass… but for the size of my room and the need for a small package… these are amazing. The NX6000 doesn’t begin to break a sweat. I’ve been startled out of my seat by blasts (on the screen) and see only 1 bar appearing on the amp. Far more power and speaker than is really needed… but it’s exactly what was wanted!

        When music is being played, the subs get dialed back a few notches. That’s primarily cause I still run base heavy for movies/shows. Music, no so much. Still, the quality of sound these subs brought is outstanding. Over the past year, I can honestly say there’s never been a time when any better was wished for. On the few occasion more bass was wanted…. it was just a matter of turning those little knobs a click or two…lol    Thanks for the introduction to CSS and the inspiration 😉

      • #26547
        123toid
        Keymaster

        That is awesome to hear! The CSS is still my favorite 12 inch subwoofer. Just a really great subwoofer. One of my patrons wanted mine, so I ended up selling it to him. And I know he’s really enjoying his as well. I’m so glad to hear that you’re spending time watching movies and listening to some good music. Don’t forget maverick comes out this Monday. I think you now know what I’m gonna be doing on Monday 😂


    • #25391
      sb-woo
      Participant

      Did anybody ever measure these things to see how they do with distortion? Im wondering how they compare.. thinking of buying a pair.

      • #25392
        123toid
        Keymaster

        @sb-woo I never measured the distortion, but I will say there is no motor noise that I hear until you push it too hard. I did run a 49dB per octave high pass on mine @20hz just to protect it. It is to this day, the best 12″ subwoofer I have ever heard. It might even be the best sounding sub in general.


    • #25408
      sb-woo
      Participant

      That is quite impressive. I have two on the way and six of the CSS APR12 passive radiators 😉 Gonna make two separate 2.8 ft^3 subs, each with three passives, 1200g added mass per passive and a 3rd order Butterworth highpass @ 16hz. Should be comfortable with around 1300w.

      Cant wait to hear them. They will sit very close to the listening position, so having quiet mechanics will be a definite bonus.

      I like the look of the boxes you did. I might do something similar. Im thinking I might do some dark gray “retractable” grill cloth that would wrap the entire bottom section of the box, concealing the woofers, and a dark “redish” stain on a nice top piece of wood. We shall see..

    • #25686
      sb-woo
      Participant

      Finished my build. Turned out pretty good. I still have to make the grey cloth grills.

    • #25694
      sb-woo
      Participant

      That is Teak. Thankfully the tornado spared my speakers jk.

      • #25702
        123toid
        Keymaster

        Haha! I know the feeling. My shop has suffered a tornado. I plan to clean it up and get organized when it gets a little more sufferable out.


You must be logged in to reply to this topic.

©2022 KLEO Template a premium and multipurpose theme from Seventh Queen

CONTACT US

We're not around right now. But you can send us an email and we'll get back to you, asap.

Sending

Log in with your credentials

or    

Forgot your details?

Create Account