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Peerless 830657 for <$6a piece!

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  • Guys, I've heard that there is continued interest in building these.
    The original crossover I posted in this thread sounds fine, but I worked quite a bit to refine the rolloff of the upper MTM mid-woofers, and
    finally managed to drop the breakup by using a Zobel. This crossover measures much flatter, and should sound a bit cleaner.
    Don't get me wrong, the original crossover is fine if you already have the parts.
    PM me if you have questions or post on this thread.


    I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
    "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

    High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
    SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
    My Voxel min sub Yet-another-Voxel-build

    Tangband W6-sub

    Comment


    • Originally posted by donradick View Post

      My drivers were labeled: FSBA25065-0801
      I found this. https://www.parts-express.com/peerle...aker--264-1146

      I thought it might interest you, and few other guys who frequently reads this topic, so I joined this forum to tell you about my "discovery".
      It says the xmax of this woofer is 6mm, so it's a little bit more than 830657's 3.5mm ;)

      Regards

      Comment


      • Originally posted by Pepper View Post

        I found this. https://www.parts-express.com/peerle...aker--264-1146

        I thought it might interest you, and few other guys who frequently reads this topic, so I joined this forum to tell you about my "discovery".
        It says the xmax of this woofer is 6mm, so it's a little bit more than 830657's 3.5mm ;)

        Regards
        Interesting - thanks for the link.
        The 2 drivers T/S parameters are remarkably similar, yet the sds-160F25 has much better xmax. Strange.

        I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
        "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

        High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
        SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
        My Voxel min sub Yet-another-Voxel-build

        Tangband W6-sub

        Comment


        • Hi.

          Can you share the sketchup file? if you don't mind.

          Thanks.
          Zol..

          Comment


          • Originally posted by norhafyzol View Post
            Hi.

            Can you share the sketchup file? if you don't mind.

            Thanks.
            Zol..

            Here you go.
            It's my typical "close enough to start cutting wood".
            Forget about the "1/32" dimensions on the baffle. Add "1/32" and only use "1/16" dimensions.

            Slot port is not present in the Sketchup model. Details are in this thread.

            OOPS, The forum will not let me attach a .SKP file.
            PM me with your email address and I'll get it to you.
            Last edited by donradick; 10-23-2017, 12:54 PM. Reason: attachment attempt

            I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
            "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

            High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
            SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
            My Voxel min sub Yet-another-Voxel-build

            Tangband W6-sub

            Comment


            • Originally posted by donradick View Post


              Here you go.
              It's my typical "close enough to start cutting wood".
              Forget about the "1/32" dimensions on the baffle. Add "1/32" and only use "1/16" dimensions.

              Slot port is not present in the Sketchup model. Details are in this thread.

              OOPS, The forum will not let me attach a .SKP file.
              PM me with your email address and I'll get it to you.
              Give the file a different extension like .zzz or something else that is accepted and change it back when using it.
              Don't worry, if your parachute fails, you have the rest of your life to fix it.

              If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

              Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D

              Comment


              • Maybe this will help. Obviously flawed and incomplete.
                rename file extension to ".skp"

                radical-towers-PBO-66-baffle.doc

                I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
                "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

                High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
                SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
                My Voxel min sub Yet-another-Voxel-build

                Tangband W6-sub

                Comment


                • Thanks man.

                  It really help.
                  I will open build thread when i start the build.
                  Now collecting info and material..

                  Comment


                  • Don,

                    I have a pair of these about 75% of the way completed, and I had a few quick questions if you don't mind.

                    I've read through the build thread, and noticed something about the width of the port. Using 3/4" material, and with the outer width dimension being 9.5", that gives an 8" inner dim to work with. Your comment about the port says you made it 7 7/8" wide. Did you get some 1/8" material and line one side wall of the port to bring it to that dimension?

                    For stuffing/wall treatment... I have the top and side walls of the front woofer area lined with some dense 1/2" carpet foam to catch reflections, and the entire back wall lined with R-13 insulation with plans to stuff some poly-fill over the R-13 (only in the back half of the enclosure). My question is, if you were to hazard a guess, how many pounds of poly stuffing do you feel would be equal to your amount of denim stuffing?

                    My last question is about the woofer wiring. I looks like from the XO, all six woofers are wired in series parallel (with the 6mH coil between the MTM and bottom four), and ending up with a 5.3 Ohm impedance. Is this correct?

                    Click image for larger version

Name:	XO Woofer Wiring.jpg
Views:	1
Size:	31.0 KB
ID:	1380305
                    Last edited by DIYNut42; 06-28-2018, 05:14 AM.
                    RYAN N.

                    "Why do you have the stereo on while you're watching TV?" - "....Cause I like to party."

                    RSS390HF Build - http://techtalk.parts-express.com/sh...d.php?t=224998
                    AviaTrix Build - http://techtalk.parts-express.com/sh...d.php?t=230372
                    Wolf's PC Speakers Build - http://techtalk.parts-express.com/sh...84#post1838384
                    Overnight Sensations MT Build - http://techtalk.parts-express.com/sh...ation-MT-build

                    Comment


                    • Originally posted by DIYNut42 View Post
                      Don,

                      I have a pair of these about 75% of the way completed, and I had a few quick questions if you don't mind.

                      I've read through the build thread, and noticed something about the width of the port. Using 3/4" material, and with the outer width dimension being 9.5", that gives an 8" inner dim to work with. Your comment about the port says you made it 7 7/8" wide. Did you get some 1/8" material and line one side wall of the port to bring it to that dimension?

                      For stuffing/wall treatment... I have the top and side walls of the front woofer area lined with some dense 1/2" carpet foam to catch reflections, and the entire back wall lined with R-13 insulation with plans to stuff some poly-fill over the R-13 (only in the back half of the enclosure). My question is, if you were to hazard a guess, how many pounds of poly stuffing do you feel would be equal to your amount of denim stuffing?

                      My last question is about the woofer wiring. I looks like from the XO, all six woofers are wired in series parallel (with the 6mH coil between the MTM and bottom four), and ending up with a 5.3 Ohm impedance. Is this correct?

                      Click image for larger version

Name:	XO Woofer Wiring.jpg
Views:	1
Size:	31.0 KB
ID:	1380305

                      Turns out the slot port width is fairly insensitive to variations. Slot port tuning is very sensitive to height of the slot.
                      I usually do not cut dados for my slot ports, I cut 1/4 inch BB to an exact height, and glue one in each side for the
                      slot port "cover" to sit on. So don't sweat the exact width, worry about the height.

                      My walls were covered with Dow 703 compressed fiberglass. Add poly until it's pretty full, but not packed.
                      I packed in more filling towards the back of the box, and left some space open in the front so the woofers
                      had a clear path to the slot port on the bottom. I would (very roughly) guess about 1.5 - 2.0 pounds poly
                      per speaker, but I'd really gauge filling based more on density than weight. Fill it up, but do not compress
                      it tightly.

                      I actually ran a LIMP on all six woofers in the box wired series / parallel and got 5.9 ohm minimum.
                      Add to that R value the DCR of the laminate coil to get the final minimum impedance.

                      Hope this helps! You are in for a treat.....
                      BTW, where are your build pics?

                      I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
                      "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

                      High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
                      SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
                      My Voxel min sub Yet-another-Voxel-build

                      Tangband W6-sub

                      Comment


                      • Originally posted by donradick View Post


                        Turns out the slot port width is fairly insensitive to variations. Slot port tuning is very sensitive to height of the slot.
                        I usually do not cut dados for my slot ports, I cut 1/4 inch BB to an exact height, and glue one in each side for the
                        slot port "cover" to sit on. So don't sweat the exact width, worry about the height.

                        My walls were covered with Dow 703 compressed fiberglass. Add poly until it's pretty full, but not packed.
                        I packed in more filling towards the back of the box, and left some space open in the front so the woofers
                        had a clear path to the slot port on the bottom. I would (very roughly) guess about 1.5 - 2.0 pounds poly
                        per speaker, but I'd really gauge filling based more on density than weight. Fill it up, but do not compress
                        it tightly.

                        I actually ran a LIMP on all six woofers in the box wired series / parallel and got 5.9 ohm minimum.
                        Add to that R value the DCR of the laminate coil to get the final minimum impedance.

                        Hope this helps! You are in for a treat.....
                        BTW, where are your build pics?
                        This helps a ton. Thanks for your time, Don!

                        Unfortunately, I haven't taken any pics, but I will be sure and snap a few before and after they're all finished up. I've switched gears over the past few years, and started a small woodworking business. Building cabinets for my past speakers made me realize how much I enjoyed the woodworking aspect of the hobby, and it kind of took off from there. I still drop in to the forum now and then, and came across this thread last year. Decided to snatch up a box of these Peerless to start rebuilding my HT/Music system. Between client builds, and projects for my girlfriend and I, I haven't had a lot of time to work on them, or start an actual build thread. :-/
                        RYAN N.

                        "Why do you have the stereo on while you're watching TV?" - "....Cause I like to party."

                        RSS390HF Build - http://techtalk.parts-express.com/sh...d.php?t=224998
                        AviaTrix Build - http://techtalk.parts-express.com/sh...d.php?t=230372
                        Wolf's PC Speakers Build - http://techtalk.parts-express.com/sh...84#post1838384
                        Overnight Sensations MT Build - http://techtalk.parts-express.com/sh...ation-MT-build

                        Comment

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