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  • IB sub system help with picking drivers

    Hello people I’d like to make a IB sub setup in my house I have tons of room for this My thoughts are to use cheap drivers from parts express and try using smaller drivers And many of them. 6” 8” 10” or something like them. I’m thinking that if I use say a 10” or 8” drivers and having something like 20 or 30 of them in a Multimanifold type setup in my attic , firing directly into my TV room. But the Mission is to use as cheap of drivers as possible. I’m talking like $5 or $10 apiece type drivers. Ones that are on closeout or liquidating or whatever. I know how to wire multiple drivers, I know all about impedance and ohms and so forth. But I would just like a lot of input from you guys and your thoughts and suggestions on drivers. I don’t care if they’re cheap pyramid or goldwood or whatever. If you would like to except this challenge? Please chime in. If you have negative things to say about this challenging project! Just don’t say anything at all please Here’s a few pics of my room with and without furniture Sent from my iPhone using Tapatalk

  • #2
    I had 4 15" dayton IB385 in a cube shaped manifold pretty flat down to 16hz in a room of similar size. There is a scene in Finding Nemo, where the mean little brace faced girl taps on the aquarium. The way the shop pressurized felt just like you would expect it to if you were underwater and stuffed in that tiny aquarium and some giant were drumming on the glass.
    Anyhow, IB rule #1, there is no replacement for displacement. It would take a lot of cheap 10" drivers to fill that room. Most cheap'r drivers lack xmax, and you're going to need plenty of that. Instead of lots of cheap drivers, maybe a quad of more modestly priced drivers?
    Rule #2, due to placement constraints, among other issues, you will need eq.
    Rule #3, power. Regardless of what others may say, I can tell you, from experience, an IB needs power. Oversize the amp, you can always turn it down.
    Now running 2 18" Stereo Integrity as IB in the upstairs movie room. They're ok but need way more power than the Behringer ep2500 can supply. The hvac constantly cycles when watching movies at volume and various pieces of drywall throughout the house are cracked. The ib385 were more efficient.
    Google 'cult of the infinitely baffled'. If Thomas is still there, he can set you on the right track.
    Might also find '12 shevas dancing' interesting.
    http://techtalk.parts-express.com/fo...khanspires-but
    http://techtalk.parts-express.com/fo...pico-neo-build
    http://techtalk.parts-express.com/fo...ensation-build

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    • #3
      Back then, IIRC, the Stereo Integrity 18's were like $160 and the ib385 ... $100?. Also, if doing a manifold for 30 drivers the cost of wire, wood, supplies, and labor are going to somewhat offset the cost.
      http://techtalk.parts-express.com/fo...khanspires-but
      http://techtalk.parts-express.com/fo...pico-neo-build
      http://techtalk.parts-express.com/fo...ensation-build

      Comment


      • #4
        Great info guys As for wood and wires and amps. I’m covered on all of that. I’ll be building it myself and I have 6 crown amps and a 8 channel altec that was used for flying subs in the New Orleans Superdome. And it’s a monster of a amp and is about 120lbs Still working in some of the boards in her I guess I’m just trying to be different about it. What’s good specs for IB drivers? I come across tons of pro and home gear being close to Orlando and Daytona. And I have all the test gear for testing drivers and amps and all that craziness that goes with audio nuttiness. Lol Sent from my iPhone using Tapatalk

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        • #5
          Although upstairs still has an IB setup, it was finished many years ago and I'm not current on what's out there. I always like a bargain vs mega$ drivers, not that they are necessarily just as good, because a lot of times they may or may not be, it's because I can only afford the cheap beer.
          This might help choose the driver http://www.ibsubwoofers.com/
          And here is the Cult https://ibsubwoofers.proboards.com/
          Should find plenty of interesting reading there.
          http://techtalk.parts-express.com/fo...khanspires-but
          http://techtalk.parts-express.com/fo...pico-neo-build
          http://techtalk.parts-express.com/fo...ensation-build

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          • #6
            Thank you and I will do so Sent from my iPhone using Tapatalk

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            • #7
              If you are trying to find a driver for an IB sub, the recommendation is to find ones with a Qts between 0.55 and 0.80 (the closer to 0.7 the better) with a resonant frequency as low as you can find, preferably in the 20s. Power handling is important, but can be worked around if you use multiple drivers. The same with Xmax.

              This might work, but its a little above your stated budget and it might need a little EQ to get down in the 20s:
              https://www.parts-express.com/10-hig...4-ohm--299-628
              -Bob

              The PEDS 2.1 mini system
              My A7 Project - another small desktop speaker
              The B3 Hybrid Dipole - thread incomplete and outdated

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              • #8
                But don't get hung up on specs.
                qts really isn't as big of an issue as specs might lead one to believe, neither is fs as long as it is reasonable. Generally a sub will play well below it's fs, and remember, if for no other reason than the issue of location 'where do I stuff all these monsters', dsp or eq'ing is, IMO, a necessity. Displacement is the biggie, which usually requires multiple drivers and power.
                12 Shivas Dancing https://web.archive.org/web/20151002...-12Shiva1.html

                Fore reference, the Carver ALs are nearly 6' in height. The space the subs occupy is approx. 900ft³ minus the hvac system.
                Click image for larger version

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                http://techtalk.parts-express.com/fo...khanspires-but
                http://techtalk.parts-express.com/fo...pico-neo-build
                http://techtalk.parts-express.com/fo...ensation-build

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                • #9
                  I use two push pull manifold loaded pairs of Acoustic Elegance IB15HT8s and need on EQ and can shake you hair and create a draft through the room. Most of the time they move little air.

                  A few basics:
                  They have to be push pull mounted or they'll shake the walls and create a lot of mechanical noise.
                  FS below 24hz and Qts above .4 but close will work
                  The manifold has to be just as sealed as a closed box or air will leak and create noise too.

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                  • #10
                    I'd recommend the GRS 10" subwoofer for this application. At $20 each, it's a little over your desired price point, but it's got a bumped back plate, a pretty good xmax for a cheap driver, and good specs for IB. 16 of them would be insane.
                    _____________________________
                    Tall Boys
                    NRNP Computer Sub
                    The Boxers
                    The Hurricanes
                    The Baronettes
                    Conneccentric
                    UX3

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                    • #11
                      I will look into them Thanks Sent from my iPhone using Tapatalk

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                      • #12
                        At 4+ units, the grs poly drops to $18.80, PE also has a 'request large quantity quote' option.
                        http://techtalk.parts-express.com/fo...khanspires-but
                        http://techtalk.parts-express.com/fo...pico-neo-build
                        http://techtalk.parts-express.com/fo...ensation-build

                        Comment


                        • #13
                          It’s a nice looking driver. I’ll call them and see what type of deal I can get Sent from my iPhone using Tapatalk

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