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Joe X

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Everything posted by Joe X

  1. The following are the modeling curves for a sealed box inside some car: Output in dB (normalized) inside a car: An then impedance: As you can see at about 36Hz impedance is close to 30 ohm up from close to 4 ohm at the extremes. You would expect a heavy dB loss around 36Hz due to the high impedance, right? But as you can see that doesn't happen, not at all. Not even a little bit. And this is not power (W) but output (dB) which are not the same.
  2. If you worry about your drivers heating inside the sealed box you can always mount them backwards so that the motors are outside the box for better cooling.
  3. Probably you can do two sealed or one ported but not two due to all displacements, get a copy of Torres calculator to figure out your net internal volume of a particular design. Link to Torres calculator: https://bit.ly/Tvj3gB
  4. This was better in the enclosures section I think, Do a box sub / port up to sundown specs to avoid rattle.
  5. Give unclipped 750W RMS to this sub and it will work without issues if your box is properly designed, NEVER forget to engage your amp's subsonic filter to 28-30Hz.
  6. Yes, the pic is just an assembly guide, the extension is so small that you could just not do it.
  7. Can be done like this, subs /port firing forwards/backwards, power: to subs rated: 45s are done as follows:
  8. The BRZ1200 has an output to feed a second amp so you can do that. You will need to gain match though.
  9. If you are looking to save space then yes at least two 8"s, two 10s will give you about 43% of extra cone area and will only cost you about 0.8 cubes of extra of net volume. Depends on your goals.
  10. You have space for 12s back there, I wouldn't do 8s more so if you are thinking of upgrading later.
  11. Fix the black on dark grey man, on your question you don't mention the vehicle, power, don't provide a sketch of your plan, and you are using a really inaccurate calculator... welcome to SMD!
  12. So here is a suggestion to 750W RMS for the SA-8v2, depending on your specific vehicle you may probably want different port/sub aimings: Enclosure Specifications: Fb = 34.5 Hz Vb = 0.66 ft^3 External Height = 9.5 in External Width = 21.25 in External Depth = 13.25 in Port Width = 1 3/8 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front & Back = 21 1/4 x 9 1/2 Left & Right Sides = 11 3/4 x 8 Top & Bottom = 21 1/4 x 11 3/4 L Port Internal Assembly Parts: Front to Back = 10 3/8 x 8 Extension = 16 1/4 x 8 Extension 2 = 3 1/8 x 8 Assembly guide (generic dimensions): Important notes: - Setting your amp subsonic filter to 28Hz is suggested.
  13. Most car audio speakers are designed to work on a infinite baffle setting so if you box them try to make the box on the large side to get the most from them. Other than that they will work fine wired in series as you say.
  14. Here is a suggestion, 2K RMS limit and had to go to 15.5H hope you can fit that : Enclosure Specifications: Fb = 33 Hz Vb = 3 ft^3 External Height = 15.5 in External Width = 33.5 in External Depth = 19 in Port Width = 3 3/4 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: 2 x Front & Back (3 parts) = 33 1/2 x 15 1/2 Left & Right Sides = 16 3/4 x 14 Top & Bottom = 33 1/2 x 16 3/4 L Port Internal Assembly Parts: Front to Back = 13 x 14 Extension = 16 1/2 x 14 Assembly guide (generic dimensions): Subsonic filter to 27 Hz. Let me know any questions.
  15. Just click "File" and then "download as", choose the format of the spreadsheet and that's all.
  16. It's the Sanitarium's spreadsheet if I am not mistaken, is just that I didn't have an address for it, you should download it to use it. It is a very accurate calculator.
  17. Updated the sketch, extension is the length of the port after it turns. In this case is so small that it can be left out without causing a significant change in tuning.
  18. You can run Torres on mac just download virtualbox and get a copy of windows. That's all you need.
  19. Here is a suggestion done on your specs: Enclosure Specifications: Fb = 32 Hz Vb = 0.75 ft^3 External Height = 9.5 in External Width = 21.25 in External Depth = 14 in Port Width = 1 1/2 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front = 19 x 8 Back = 21 1/4 x 8 Left & Right Sides: Side 1 = 12 1/2 x 8 Side 2 = 13 1/4 x 8 Top & Bottom = 21 1/4 x 14 L Port Internal Assembly Parts: Front to Back = 11 x 8 Extension = 16 x 8 Extension 2 = 6 1/4 x 8 Assembly guide (generic dimensions): Let me know any questions.
  20. The RE calc is off. For a side firing port: Enclosure Specifications: Fb = 32 Hz Vb = 4.68 ft^3 External Height = 30 in External Width = 30 in External Depth = 16 in Port Width = 14 1/2 in Port Height = 5 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: 2 x Top & Bottom (3 parts) = 30 x 16 Left & Right Sides = Side 1 = 22 3/4 x 14 1/2 Side 2 = 27 3/4 x 14 1/2 Front & Back = 30 x 27 3/4 L Port Internal Assembly Parts: Side to Side = 23 1/2 x 14 1/2 Extension = 1 x 14 1/2 Assembly guide (generic dimensions):
  21. What is that you don't like about it's sound?
  22. What I would like to know is why you are limited to those dimensions.
  23. The sketch is generic, they do fit very tightly one towads the front one towards the back.
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