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Triticum Agricolam

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Triticum Agricolam last won the day on December 16 2017

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About Triticum Agricolam

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    170db

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  • Gender
    Male
  • Location
    Eastern Washington State
  • Interests
    Speaker enclosure design & construction

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  1. 2017 f 150 crew cab

    The problem with the box the local builder built is its pretty low on port area. Two 2" x 4" ports would be fine on 300 total watts, maybe 350, but anything above that and you are going to be throwing your power away due to port compression, not to mention all the port noise. This is why the sealed box would be better.
  2. Total newbie enclosure build questions

    I probably would stay sealed.
  3. Bandpass for 8" subs?

    Ok your current box should be good to go then. The reason I was asking was to find out if you had like a single 4" port or some other reason why your output would be lower than it should be. As far as tuning to different frequencies, to do that you will need a 6th order bandpass box. 4th order bandpass boxes only have one tuning frequency.
  4. Bandpass for 8" subs?

    Ported boxes are USUALLY going to get you the most performance for the space. Unless you have a really good reason to go with a band pass box, I’d stick with ported. How much port area does your current box have?
  5. Jigsaws - Barrel Grip vs Top Handle?

    I like my top handle better. You are picking the right brand!!!
  6. How much sound comes out from port and from sub?

    Right at the tuning frequency almost 100% of the output comes out of the port. As you move away from the tuning frequency output from the port drops off and output from the cone picks up.
  7. Total newbie enclosure build questions

    That's going to be tough. If you don't have enough space to do a ported box right, you may be better off just making the box sealed.
  8. I've always used the cheaper carpet from Parts Express and I've had good luck with it. I would buy it again.
  9. Like others have said, the mic is the hard part. Here are a couple other mic options: https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808 https://www.minidsp.com/products/acoustic-measurement/umik-1 Once you have a mic the software is the easy part. I use one called Room EQ Wizard (REW), its free and there is lots of info out there on how to use it.
  10. Sealed Enclosure Help RE XXX 15

    No prob, glad I could help.
  11. Sealed Enclosure Help RE XXX 15

    Sealed boxes are not very sensitive to changes in volume. It is extremely unlikely you will be able to hear any difference at all between a 2.1 cu ft box and a 2.75 cu ft box. Here are the 2.1, 2.5, and 2.75 cu ft boxes compared in WinISD: The blue line is the 2.1, the yellow the 2.5, and the red the 2.75. At 30 Hz there is only .3 dB of difference between the 2.1 cu ft and the 2.75 cu ft. If it were me, I'd just build whichever size fits your space best.
  12. Will this work?

    Looks like you are off to a good start! Nice job with SketchUp. I understand your concern about the panel where the sub mounts being pretty narrow. I think you can fix that without a complete redesign though. I'd make the side panel and the port panel each 3/4" shorter and the baffle panel where your sub mounts 1.5" wider. This way the baffle overlaps the side and port panels instead of it being the other way around. All your internal and external dimensions will remain the same. The main thing you want to avoid is putting the mounting screws into the end grain of your panels, screws don't hold well like that. How much power are you going to be running? 2.75 cu ft is definitely on the big side for an E-12. How wide is your port? The 3.75" gap between the port and the side wall is probably narrow enough it's going to lower your tuning some. Regardless of that you will probably end up tuned a bit low anyway because WinISD doesn't calculate proper end correction for slot ports, FYI.
  13. SA x12 v2 D2/Best SPL frequency for ported enclosure

    Tuning higher will get you a higher peak SPL in most cases, but you will lose your ability to play the lows. Everything is a trade off. There isn't one "best" tuning frequency, it all depends on what your goals are, what kind of music you listen to, etc.
  14. matching amplifiers phase

    0 degrees does exist, its the input signal! If an amp doesn't have a pot for phase adjustment there is no reason it wouldn't be completely in phase with the input signal (or completely out of phase, depending on how you have the switch set).
  15. Sundown Audio: 4 SA-8's or 1 z12

    Yup, still the case. With a trunk car you don't want anything firing up.
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