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Sure 2x250 Amp build

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  • Sure 2x250 Amp build

    I just use Oak 1/2" Plywood with miter joints. Front panel is 1/4" Aluminum, rear panel is Hardboard. Both have several coats of flat black followed by several coats of satin black. Case Ebony stain with several coats of spray poly.




    All the wire I used is Silver coated copper with Teflon case. All connections are soldered including the crimped on stakes.

    " 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/

  • #2
    Re: Sure 2x250 Amp build

    Craig designed the schematic and layout. Thanks Craig.

    I used the Avel 625va Toroidal Transformer 40v+40v pt# 122-690 http://www.parts-express.com/avel-y2...ormer--122-690 which has two secondaries through two 400v 25amp Bridge Rectifiers http://www.parts-express.com/400v-25...ifier--050-060. two 10amp slow blow fuses and two 16000 68volt capacitors. Each big cap is also jumped with a 0.10 Q3 Audyn cap. I mounted the rectifiers on aluminum plate with thermo paste and screws.

    " 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


    • #3
      Re: Sure 2x250 Amp build

      Very nice! Please be sure to let us know what you think when you get it going? What preamp are you going to use? It will be a nice feeling to be powering speakers you made with an amplifier that you built. Congratulations.
      Howard

      Comment


      • #4
        Re: Sure 2x250 Amp build

        Because I cant seem to leave good enough alone I mounted a glass knob on the front and shined two 12vdc led lights through it. I alson mounted a 12vdc coolermaster fan on the rear panel near the boards heatsink. These are powered with a 9vdc walwart.




        Inlet holes to the left of the Rectifiers and near the walwart and rubber feet finish it off.
        [IMG]
        by the way, the front is held on with threaded inserts.
        http://i413.photobucket.com/albums/pp216/arlis/sure%202x250%20amp/2x250amp022_zpscea75586.jpg[/IMG]
        Last edited by [email protected]; 11-30-2013, 12:26 PM.
        " 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: Sure 2x250 Amp build

          This is bound for the home theater and will controlled by my Onkyo AVR. I did get some chatter on the right speaker last night during Two Guns. (very good movie) that makes me think the fan is causing some interference. not sure though.
          " 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


          • #6
            Re: Sure 2x250 Amp build

            damn. I just noticed my speakers are wired out of phase. Imagine that.
            " 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


            • #7
              Re: Sure 2x250 Amp build

              That is pretty cool, nice job. Is there any turn-on pop? I've wanted to build one but never knew exactly what parts I had to have - soft start board, speaker protection board, size and wiring of caps & fuses, etc. The Sure 2x100 board I have does get a turn on/turn off pop or thump with a Meanwell 350-27 so I just set it aside. It's a good feature the Sure amps can handle a 4 ohm load as well.

              Again, nice!

              Eric

              Comment


              • #8
                Re: Sure 2x250 Amp build

                Why did you use coax cable to wire the outputs?

                Later,
                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:
                http://photobucket.com/Wolf-Speakers_and_more

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

                Comment


                • #9
                  Re: Sure 2x250 Amp build

                  A suggestion some intake vents for cooling > unless I missed them. I suggest a hole near the front in the bottom panel .

                  Comment


                  • #10
                    Re: Sure 2x250 Amp build

                    Originally posted by IBM5150 View Post
                    That is pretty cool, nice job. Is there any turn-on pop? I've wanted to build one but never knew exactly what parts I had to have - soft start board, speaker protection board, size and wiring of caps & fuses, etc. The Sure 2x100 board I have does get a turn on/turn off pop or thump with a Meanwell 350-27 so I just set it aside. It's a good feature the Sure amps can handle a 4 ohm load as well.

                    Again, nice!

                    Eric
                    no real pop to speak of.
                    thank you.
                    " 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


                    • #11
                      Re: Sure 2x250 Amp build

                      Originally posted by Wolf View Post
                      Why did you use coax cable to wire the outputs?

                      Later,
                      Wolf
                      Thought the shielding was desirable. Do you disagree?
                      " 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


                      • #12
                        Re: Sure 2x250 Amp build

                        Originally posted by philiparcario View Post
                        A suggestion some intake vents for cooling > unless I missed them. I suggest a hole near the front in the bottom panel .
                        I agree.
                        " 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


                        • #13
                          Re: Sure 2x250 Amp build

                          Originally posted by [email protected] View Post
                          Thought the shielding was desirable. Do you disagree?
                          Shielding is desirable for the input stage, as that can be detrimental after it gets amplified. Once the signal is amplified, the voltage
                          output is less affected by any close noise generation.

                          Shield the inputs, standard large gauge the outputs.
                          Later,
                          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:
                          http://photobucket.com/Wolf-Speakers_and_more

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

                          Comment


                          • #14
                            Re: Sure 2x250 Amp build

                            Originally posted by Wolf View Post
                            Shielding is desirable for the input stage, as that can be detrimental after it gets amplified. Once the signal is amplified, the voltage
                            output is less affected by any close noise generation.

                            Shield the inputs, standard large gauge the outputs.
                            Later,
                            Wolf
                            probably should have got some 2wire plus shielding for the inputs. Is 14 gauge fine? I don't even think I could get that in the board. Holes are really small.
                            Any opinion on why I'm get a clicking sound from the right speaker?
                            " 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


                            • #15
                              Re: Sure 2x250 Amp build

                              Large gauge would be debateable. I would look for solid core for sure. 16ga should be plenty

                              Comment

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