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The Renditions - An Anarchy TMM Active/Passive Build

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  • The Renditions - An Anarchy TMM Active/Passive Build

    My first foray into active crossovers, so I'm still learning and tweaking the system. So far, I like what I'm hearing. I got measurement graphs as well, so please critique them and let me know what needs improvement.

    Drivers: Exodus Anarchy 7" Woofers in parallel, mated with the Dayton Audio RS28F tweeters.

    Enclosure: 1.0 cu ft, vented, tuned to 40Hz, with a F3 of 45Hz.

    Electronic Crossover: Behringer CX3400.

    DIY Amplifiers: Tripath TA2022 (2X100W into 4R), LM4780 in parallel mode (2X120W into 4R).

    Crossover frequency: 1,500Hz, 4th order LR (CX3400 default slope).

    Measuring Mic: Dayton Audio EMM-6 purchased from Cross Spectrum Labs.

    Software: Bassbox and Arta.

    Since the CX3400 does not allow any baffle step compensation, I added a full 6dB to the woofer with a 0.9mH inductor and 3.3R resistor (hanging in the back of the box). The CX3400 is quite flexible with gain levels, allowing the user the match the driver levels easily. The overall frequency response of the system is very decent, varying at +- 2.5dB at the most (no smoothing). I also measured the woofers and tweeters separately by muting the appropriate drivers, to determine the correct crossover frequency, since there's no digital display on the Behringer.

    Listening impressions: I'm just floored by the power of the Anarchy woofers. Bass is solid, deep and just awesome on my test tracks. No need for a sub here. Soprano voices and instrumental pieces are crisp and detailed. My favorite tweeter has always been the Vifa XT25TG30-04, and the RS28F is not going to change my mind here. On certain tracks, the sibilance of the RS28F can be annoying, and I find myself dialing down the High gain on the CX3400 in a hurry. Could the CX3400 be the cause? I don't know, since this is my first design using this tweeter. Overall, I'm happy with and excited about the newly acquired knowledge, but I'm sure that's just the tip of the iceberg. Thanks for reading.

    Hong
    Attached Files
    Last edited by hongrn; 05-11-2015, 07:44 PM.
    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

  • #2
    Re: The Rendition Mini Towers - My First Active System

    Graphs posted. Overall system frequency measured at 1m. Woofer and tweeter graphs measured nearfield.
    Attached Files
    Last edited by hongrn; 10-14-2013, 10:38 AM.
    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


    • #3
      Re: The Rendition Mini Towers - My First Active System

      Those look really nice! I'm planning to build some Ansonicas with the Anarchys once I get another pair from diysoundgroup.
      Projects:
      Ansonica
      Pico Neo

      Comment


      • #4
        Re: The Rendition Mini Towers - My First Active System

        nice.
        " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

        Quote Originally Posted by hongrn. Oct 2014
        Do you realize that being an American is like winning the biggest jackpot ever??

        http://www.midwestaudioclub.com/spot...owell-simpson/
        http://s413.photobucket.com/albums/pp216/arlis/

        Comment


        • #5
          Re: The Rendition Mini Towers - My First Active System

          Looks very nice. Is that black finish plastic laminate with wood veneer sides? Finally a few more designs using the Anarchy. Still have 4 that I am looking forward to a winter build with.

          Comment


          • #6
            Re: The Rendition Mini Towers - My First Active System

            Hey Uncle Bob,

            Yes, it's black glossy laminate in the front and top, black melamine in the back, and red oak veneer on the side. Just waiting for speaker spikes to arrive to complete the build. Thanks.

            Hong

            Originally posted by Uncle Bob View Post
            Looks very nice. Is that black finish plastic laminate with wood veneer sides? Finally a few more designs using the Anarchy. Still have 4 that I am looking forward to a winter build with.
            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


            • #7
              Re: The Rendition Mini Towers - My First Active System

              I find a contour filter on the rs28f helps, it has a rising response starting around 5k. Try a .025mh inductor with 1.5 to 3ohms resistance in series with tweeter. Or the equivalent dsp contour.

              Comment


              • #8
                Re: The Rendition Mini Towers - My First Active System

                How did you calculate those values? Thanks.

                Originally posted by christophertherrick View Post
                I find a contour filter on the rs28f helps, it has a rising response starting around 5k. Try a .025mh inductor with 1.5 to 3ohms resistance in series with tweeter. Or the equivalent dsp contour.
                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


                • #9
                  Re: The Rendition Mini Towers - My First Active System

                  I modeled a passive crossover for the Renditions to give myself the flexibility of using either setup, active or passive. The crossover frequency is at 1,800Hz, second order electrical on the woofers, and third order on the tweeter. Please note that this is a 2-way, not 2.5. Active or passive, the Anarchy woofers are impressive with the low end. Here are some measurements:

                  Hong
                  Attached Files
                  Last edited by hongrn; 09-06-2015, 08:27 PM.
                  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


                  • #10
                    Re: The Rendition Mini Towers - My First Active System

                    Crossover and dimensions:
                    Attached Files
                    Last edited by hongrn; 08-19-2015, 01:31 PM.
                    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


                    • #11
                      Re: The Rendition Mini Towers - My First Active System

                      Thankya!
                      Ed Henderson

                      Comment


                      • #12
                        Re: The Rendition Mini Towers - My First Active System

                        Those look great! Nice project!

                        Comment


                        • #13
                          Re: The Rendition Mini Towers - My First Active System

                          You think the Crossover will work in an MTM?

                          Comment


                          • #14
                            Re: The Rendition Mini Towers - My First Active System

                            Brother Hong,

                            They look great.

                            Absent the false bottom they would be 20"H X 8"W X 14"D.

                            I think I will plan on building them.

                            Am I correct that these are the 8ohm versions of the Anarchy?
                            Sausage With Meat Sause, Please

                            Comment


                            • #15
                              Re: The Rendition Mini Towers - My First Active System

                              Beau, the dimensions are 25" X 8" X 14" (1.0 cu.ft). These are the 8ohm versions. Thanks.

                              Originally posted by Beau View Post
                              Brother Hong,

                              They look great.

                              Absent the false bottom they would be 20"H X 8"W X 14"D.

                              I think I will plan on building them.

                              Am I correct that these are the 8ohm versions of the Anarchy?
                              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

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