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Epique PR's!

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  • #16
    I'm looking forward to seeing the specs, so thanks for that.

    TomZ

    Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
    *Part 2 *Gluing multiple curved laminations of HDF

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    • #17
      I just wanted to bump this to the top...

      Are specs for these available yet? Inquiring minds would like to know.

      TomZ
      Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
      *Part 2 *Gluing multiple curved laminations of HDF

      Comment


      • #18
        I just received a classic "Are you still thinking about this item" email in regards to these passive radiators. I was very excited thinking that they were finally available. Alas, not the case and they are still unavailable. The price is now listed when viewing on mobile which is a minor update.

        Comment


        • #19
          Just ordered my pair of 7" PRs....
          Wolf
          "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
          "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
          "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
          "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

          *InDIYana event website*

          Photobucket pages:
          https://app.photobucket.com/u/wolf_teeth_speaker

          My blog/writeups/thoughts here at PE:
          http://techtalk.parts-express.com/blog.php?u=4102

          Comment


          • silverD
            silverD commented
            Editing a comment
            Ditto! Thanks for the heads up. I tossed in some binding posts and banana plugs (typical filler) and got free shipping and 12% off!

          • Wolf
            Wolf commented
            Editing a comment
            Me too! I added a couple cheap things, then took off 12%.

        • #20
          I would like to see a 8" and 10" version of these.

          Comment


          • #21
            Are these suitable for small 2-way speakers, or are they mostly for subs?

            Comment


            • #22
              I suppose it depends on application, and your HD requirements, but I've seen several small designs with the active woofers.

              For example, the HD climbs above 450 Hz on the E150HE44, to above 2%. That said, they can take 200W, and don't need much volume. My recent model of the 150 with 180 PR and 2 added mass discs in 6 ltrs (5 ltrs after Vd of driver is removed) yields Fb/F3/F10 of 30/58/29Hz anechoic. Stuffing takes down the peak at 230Hz to flat, so there is minimal ripple. Applying room gain or maybe a large capacitance can fill in the gradual shelf a bit and lower the F3 a bit. This is all while achieving an output over 100dB, by wiring in parallel and using a 1 ohm net DCR.

              I have not worked out the full set of details yet, but that is impressive.

              In the 5 ltr volume though, more mass seems to not gain any advantage. If the target is lower extension, it can in more volume at the expense of Xmax control or the breaching of it.

              That help?
              Wolf
              "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
              "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
              "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
              "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

              *InDIYana event website*

              Photobucket pages:
              https://app.photobucket.com/u/wolf_teeth_speaker

              My blog/writeups/thoughts here at PE:
              http://techtalk.parts-express.com/blog.php?u=4102

              Comment


              • #23
                Originally posted by Wolf View Post
                I suppose it depends on application, and your HD requirements, but I've seen several small designs with the active woofers.

                For example, the HD climbs above 450 Hz on the E150HE44, to above 2%. That said, they can take 200W, and don't need much volume. My recent model of the 150 with 180 PR and 2 added mass discs in 6 ltrs (5 ltrs after Vd of driver is removed) yields Fb/F3/F10 of 30/58/29Hz anechoic. Stuffing takes down the peak at 230Hz to flat, so there is minimal ripple. Applying room gain or maybe a large capacitance can fill in the gradual shelf a bit and lower the F3 a bit. This is all while achieving an output over 100dB, by wiring in parallel and using a 1 ohm net DCR.

                I have not worked out the full set of details yet, but that is impressive.

                In the 5 ltr volume though, more mass seems to not gain any advantage. If the target is lower extension, it can in more volume at the expense of Xmax control or the breaching of it.

                That help?
                Wolf
                More confused I think. What I was considering is using the 7" passive with a 6.5" Peerless woofer in a 2-way. The box is likely to be 1 cu-ft, and tuned to about 35hz I think. My current plan is to use a port. I just wondered if this passive was suitable, or a bad match for such a design.

                Comment


                • #24
                  Originally posted by Wolf View Post
                  ...the HD climbs above 450 Hz on the E150HE44, to above 2%...
                  HD graphically illustrated below, purloined figure 15 from the article at the following link:

                  https://audioxpress.com/article/test...io-epique-line

                  Click image for larger version  Name:	20220218072237_Figure15-E150HE-44-Dayton-Audio-Epique.jpg Views:	1 Size:	364.1 KB ID:	1491275
                  And quoted from the article:

                  For the distortion measurement, the 5.5” driver was mounted rigidly in free-air, and the SPL set to 94dB (my criteria for home audio transducers) at 1m (16V), using a SoundCheck pink noise stimulus. Then, the distortion was measured with the Listen microphone placed 10cm from the driver. This produced the distortion curves shown in Figure 15, which is distinguished by very low third harmonic content above 1kHz, and less than 1% below 1kHz.
                  "Our Nation’s interests are best served by fostering a peaceful global system comprised
                  of interdependent networks of trade, finance, information, law, people and governance."
                  - from the October 2007 U.S. Naval capstone doctrine
                  A Cooperative Strategy for 21st Century Seapower
                  (a lofty notion since removed in the March 2015 revision)

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                  • #25
                    Originally posted by rpb View Post

                    More confused I think. What I was considering is using the 7" passive with a 6.5" Peerless woofer in a 2-way. The box is likely to be 1 cu-ft, and tuned to about 35hz I think. My current plan is to use a port. I just wondered if this passive was suitable, or a bad match for such a design.
                    it should work there, but maybe a bit overtkill depending on the Peerless you have.
                    Wolf
                    "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                    "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                    "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                    "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                    *InDIYana event website*

                    Photobucket pages:
                    https://app.photobucket.com/u/wolf_teeth_speaker

                    My blog/writeups/thoughts here at PE:
                    http://techtalk.parts-express.com/blog.php?u=4102

                    Comment


                    • #26
                      Originally posted by Wolf View Post

                      it should work there, but maybe a bit overtkill depending on the Peerless you have.
                      Wolf
                      I like the sturdy cast basket, and the price is not too bad. I'm sure it's overkill. I'll model it, and see. The 6.5 only needs about 20 watts.

                      Comment


                      • #27
                        Anyone else thinking the PR's aren't the easiest to incorporate?

                        Comment


                        • #28
                          I have no idea what makes them difficult to incorporate.
                          these are great passive radiators and easy to use.
                          Wolf
                          "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                          "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                          "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                          "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                          *InDIYana event website*

                          Photobucket pages:
                          https://app.photobucket.com/u/wolf_teeth_speaker

                          My blog/writeups/thoughts here at PE:
                          http://techtalk.parts-express.com/blog.php?u=4102

                          Comment


                          • #29
                            My experience with passive radiators is limited. I've modeled maybe 1-2 dozen or so.
                            When I model the 5.5" Epique with the 7" PR, it seems to come up short on the low end compared to the vented alignment. I get similar results with two 5.5" PR's. I'm familiar with a vented and passive box modeling slightly different, but not quite this
                            different. For example, I can model the 8" Dayton passive and get around 10hz lower but it runs out of steam faster. I was thinking there might be thought process as to how Dayton designed and inteded people to use these. Or more than likely I just don't know what I'm doing.

                            Comment


                            • anunnaki
                              anunnaki commented
                              Editing a comment
                              I personally use Win ISD for most of my modeling. Model your ideal vented enclosure down to ideal vent velocity, tuning etc. Then start your model with the PR with just one of them using the base parameters of the PR. Be sure to adjust the volume to the same size as the vented enclosure you just modeled. Then add mass to the PR in that section of the PR parameters and see if you can get close with one PR. If not you likely will need two for sure. Knowing what the Epique drivers are capable of you will likely need two of them for the identical sized woofer and will likely need mass if lower tune is desired. Once you get a matching or near matching SPL curve, then review your PR excursion with the expected power input and validate it is within limits.

                            • Shawn
                              Shawn commented
                              Editing a comment
                              Much appreciated anunnaki. I may have to return these. Unfortunate, they are quite nice. I purchased them based on the volume they displaced and the fact they were designed to go along side of the Epique drivers. But I can not get them to model well at all. I was hoping they had made some errors on the spec sheet and would be corrected. That in fact did happen, but the corrections did not make them usable for my small bookshelf project.

                          • #30
                            Wolf says they're easy to use so there's that.
                            Craig

                            I drive way too fast to worry about cholesterol.

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