Wet my appetite with what I could build?

Discussion in 'DIY Speaker & Subwoofer Building' started by grahamricho, Dec 6, 2018.

  1. grahamricho

    grahamricho
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    Hi all my room is a dedicated home cinema room so I can do anything I like with no WAF.

    It's 3x5m and all the gear is at one end the 3m end, which has a electric projection screen on the 3m wall.

    I'm going to buy some MK sound S300 speakers which will go behind the new acoustic fixed screen.

    I will build a false wall and everything will be hidden.

    So what would the ultimate subwoofer I could build in the space I have? I would leave all the space below the screen for a subwoofer...subwoofers?

    So the size of the space I would have would be 3000mm wide, by 500mm depth and 500mm high.

    I listen to music a lot to so something tuneful, something that I could set crossover at 80-100tz?

    I would prefer sealed....I think? Don't mind how many drivers, I have 3000mm of width.

    I'd like to build it, and enjoy it, not thinking all the time I wish I'd put xxxx drivers in? Maximum would I suppose be £500 a driver? I could alway put two in and add more if needed later?

    My concerns are if I build it and it did not work at that end of room, I would not be able to move it? I could build it as a permanent structure?

    A wall of drivers!
     
  2. grahamricho

    grahamricho
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    I have a minidsp
     
  3. jason shep

    jason shep
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    Hi Graham,
    If an Infinite Baffle bass system isn’t possible ? Then I’d recommend the BMS 18N862 drivers in sealed cabinets, I have heard these in forum member Ashmanuk’s system with MK150’s, absolutely stupendous drivers.
     
  4. grahamricho

    grahamricho
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    Hi thanks for the reply, how many drivers for a 3x5m room and a inuke powering them?
     
  5. jason shep

    jason shep
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    Ashmanuk, in roughly a 4m x 5m room has four (left pair & right pair), even at extreme output levels the, cones are hardly moving.

    It is the quality of the bass that really impresses though.
     
  6. grahamricho

    grahamricho
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    Sounds good, does he have a build thread? Or any pics on here? What does he power them with? Thanks
     
  7. jason shep

    jason shep
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    I don’t think Ashman has a build thread, he powers them with a pair of Inuke NU3000’s.
     
  8. grahamricho

    grahamricho
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    What sort of size cabinets where they in? Was it 4 separate cabinets? Thanks
     
  9. jason shep

    jason shep
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    Separate enclosures & I think they are 95litres each.
     
  10. Ringnut

    Ringnut
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    Two subs central would be a good starting point I think but more importantly where you sit will be just as critical. REW Room Simm shows the dramatic effect of moving just a little forward creating a large null.

    3X5 1.jpg

    3X5 2.jpg
     
  11. grahamricho

    grahamricho
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    Hi thanks that's interesting, I will have to get the room sim on my PC. What measurements are the seating positions different? Does one of the tabs show where the seating position is in a actual measurement ? How does it change if the subs go in the corner ? Thanks
     
  12. Ringnut

    Ringnut
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    I've used the same seating distances here (this time shown) as above but with the subs in the corner instead. The FR is pretty similar, possibly a little better, but what it does show is that seating position in this instance is actually far more important than sub positioning. Despite what the graphs say subs in the centre or in the corner may subjectively be quite different and it would be well worth trying both.

    3X5 3.jpg
    3X5 4.jpg

    And this is with four subs FWIW...

    3X5 5.jpg
    3X5 6.jpg
     
  13. grahamricho

    grahamricho
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    Thanks, it's not that much of a difference in seating position but big changes. What are the modal resonance lines?
     
  14. Ringnut

    Ringnut
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    Not sure.
     
  15. mattkhan

    mattkhan
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    The frequencies of the 1st, 2nd, ...., Nth modes (axial, oblique and tangential)
     

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