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Easy ZMA and T/S Parameters Using The LIMP Module in ARTA - An Illustrated Guide

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  • #76
    Apologies. I am very literal and don't deal well with ambiguity. So when I see one statement that says:
    Note: Do not connect your speaker driver to the jig during the calibration process.
    ...and another one that says:
    Connect left and right input channel to signal generator output!
    ...those seem to be saying different things. Everything is simple and obvious once you understand it.

    And thank you for assuming I'm a moron who didn't even attempt to read the thread before asking moron questions.

    Comment


    • #77
      Slow down. This is a hobby that is supposed to have a calming effect on the mind. No one is calling you names, or even thinking of you as such.
      Some people are addicted to Vicodin. I'm addicted to speaker building.

      The Chorales - Usher 8945A/Vifa XT25TG Build
      ESP Project 101 Lateral MOSFET Amplifier
      LM4780 Parallel Chipamp
      Sonata Soundbar Project
      The Renditions - Active/Passive Towers

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      • #78
        This is Awesome, many thanks!

        Comment


        • #79
          Is this wired correctly to test impedance? The binding posts from the limp module attach at the same point as the amp to the speaker lugs?
          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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          • #80
            You don't need the amp to test for impedance, so your set up should look like this:

            Click image for larger version

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            Some people are addicted to Vicodin. I'm addicted to speaker building.

            The Chorales - Usher 8945A/Vifa XT25TG Build
            ESP Project 101 Lateral MOSFET Amplifier
            LM4780 Parallel Chipamp
            Sonata Soundbar Project
            The Renditions - Active/Passive Towers

            Comment


            • #81
              Just a heads up if you bought a Behringer uca222 to take measurements with ARTA or REW. It's not really plug n play. At least not in my case. I let the uca222 install whatever drivers/software it installed, and it worked, or so I thought, really it only partially worked (only driver available was wmd), so I went to the Behringer site and the listed driver for the uca222 was ASIO4ALL. Downloaded and installed that with the same results. You will need the Behringer 2902 2.8.40 driver for the uca222 to work properly with ARTA or REW.

              Also, take a look at these measurements. Both ARTA and REW produced almost identical impedance sweeps of the FaitalPro 5fe120 and Vifa xt25. Why is the impedance rising in the bass?

              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

              Comment


              • BarryV
                BarryV commented
                Editing a comment
                Hi Kornbread,

                Did you ever get an answer to this question? I have the same soundcard and see the same problem.

                Barry

              • Kornbread
                Kornbread commented
                Editing a comment
                Man, I forget what I did yesterday ... this is from 17'! :o Anyhow, IIRC, it is due to the uca222 being too noisy. Instead of spending more $ on a better soundcard, I just bought a dats.

            • #82
              does the resistors wattage matter ?
              Paper Towers
              RS180P/28F surrounds
              Boombox

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              • #83
                I use a 2 watt 1% tolerance resistor in mine without issues. I don't know if higher wattage matters.
                Some people are addicted to Vicodin. I'm addicted to speaker building.

                The Chorales - Usher 8945A/Vifa XT25TG Build
                ESP Project 101 Lateral MOSFET Amplifier
                LM4780 Parallel Chipamp
                Sonata Soundbar Project
                The Renditions - Active/Passive Towers

                Comment


                • #84

                  thanks Hong . it just got me wondering . there is not much cost difference a 10w is only $ .98 .
                  Paper Towers
                  RS180P/28F surrounds
                  Boombox

                  Comment


                  • #85
                    I ordered a few of .1% resistors suggested earlier in the thread. Made a post in the classifieds if someone wants one without spending $8 on shipping.

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                    • #86
                      Arta is updated Current version 1.9.3. is released on November, 12, 2019 ArtaSetup193.exe
                      I was tired and got tired again so now I am Re tired.

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                      • #87
                        Sorry to drag this up... I am planning to buy a Sonarworks XREF20 mic and have a Steinberg CI2 interface.

                        Is it correct in assuming I can build this jig and get most of the results I want from a DATS (t/s parameters and impedance curves etc) for the cost of the jig and learning some free software?

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                        • #88
                          ARTA is actually a suite of softwares. It CAN be purchased, but even using the (slightly more limited) FREE versions, if you build that jig, you can use the "LIMP" module to (basically duplicate DATS funtions to) generate T/S parms as well as .zma files - for XO simming (no need for a mic for just that).
                          You can create .frd (FR) files (for simming) using ARTA w/a mic. Most here (for BEST results) use a mic calibrated by Cross Spectrum Labs. I've got a CSL'd Dayton EMM-6 mic that I use w/a Blue Icicle.

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                          • #89
                            Sounds like it's what I am after. I just wanted to make sure my plan to forego the DATS was with merit. I realize there is lots the DATS offers, but in the end I just wanted to be able to deduce T/S at the very least. I will research ARTA suite and what it all offers.
                            Cross Spectrum has no stock for the time being and am not sure when they'll get more. Hopefully soon. Sadly the shipping to Canada is quite high. It's always kept me from jumping on one. Ends up costing almost $200CAD to get here.

                            Comment


                            • kenny_k
                              kenny_k commented
                              Editing a comment
                              Post a WTB in the classified and keep your fingers crossed.
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