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2x250 IRS2092 amp build

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  • #61
    Re: 2x250 IRS2092 amp build

    When this thread is brought to a conclusion I will calmly check into a rehab facility....:D


    Insane in the membrane...
    NLA

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    • #62
      Re: 2x250 IRS2092 amp build

      Originally posted by [email protected] View Post
      When I finish my Polk redo, I will re-wire to have 8 parallel caps per rail and loose the ground.
      Like this one.
      Except I'll wire the rectifiers right unlike this one.
      You might want to remove or fix that picture. Someone could find that picture and wire it just like the diagram show without realizing the bottom half is wired wrong. They will blow their caps for sure.

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      • #63
        Re: 2x250 IRS2092 amp build

        OK... A picture is worth a thousand words, so here are the schematics of a basic PSU using one or 2 bridge rectifiers. Optional components such as bleeders, snubbers omitted for clarity purposes. Can we agree on this? Thanks.

        Hong
        Attached Files
        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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        • #64
          Re: 2x250 IRS2092 amp build

          Originally posted by hongrn View Post
          Can we agree on this? Thanks.
          Hong
          Looks fine. However, I'd draw the ground on the mains connector as a chassis ground or earth ground to remind yourself that this this chassis connection should be made separately, either at the input or through a ground loop isolation network. See the figure below, from this RaneNote), or see the discussion for ESP Project04. It's worth reading that RaneNote carefully...

          Free Passive Speaker Designer Lite (PSD-Lite) -- http://www.audiodevelopers.com/Softw...Lite/setup.exe

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          • #65
            Re: 2x250 IRS2092 amp build

            Got it. Thanks Neil for your guidance.

            Originally posted by neildavis View Post
            Looks fine. However, I'd draw the ground on the mains connector as a chassis ground or earth ground to remind yourself that this this chassis connection should be made separately, either at the input or through a ground loop isolation network. See the figure below, from this RaneNote), or see the discussion for ESP Project04. It's worth reading that RaneNote carefully...

            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


            • #66
              Re: 2x250 IRS2092 amp build

              Almost there Bob.



              Originally posted by robertcottiers View Post
              When this thread is brought to a conclusion I will calmly check into a rehab facility....:D


              Insane in the membrane...
              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


              • #67
                Re: 2x250 IRS2092 amp build

                Originally posted by hongrn View Post
                I agree!

                Sure am glad that we have real experts here who can advise us.
                In addition, I'm now convinced of the pitfalls.. I will never build a power supply with 2 bridge rectifiers.....

                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

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                • #68
                  Re: 2x250 IRS2092 amp build

                  Lowell,
                  I'm curious if you can hear any difference between this amp and the other one you built using the two 16,000 uF computer grade electrolytic caps? They both use the same amp module. This one's cap bank should have lower ESR. I'm wondering if that is audible or not. Thanks.
                  Craig

                  I drive way too fast to worry about cholesterol.

                  Comment


                  • #69
                    Re: 2x250 IRS2092 amp build

                    Hong: So...Did you have a power supply that was wired incorrectly or was there just some confusion with schematics....Same question for Lowell.

                    Bob...... Slowly recovering
                    NLA

                    Comment


                    • #70
                      Re: 2x250 IRS2092 amp build

                      Hi Bob,

                      All my PSUs built using one transformer and a single bridge rectifier are wired correctly, as indicated in the top diagram of the attachment in post #63. The confusion comes from the Sure board instructions calling for 2 separate PSUs, so I wired two of them together, as shown in this attachment. The rail voltages come out correctly, and in my case, they were -56V/0/+56V. The amp board plays loud and clean, and there is no hum of any sort. There may be a floating ground some where in there, but it did not affect the amp at all. Lowell went down the same road I did (sorry man)...

                      Originally posted by robertcottiers View Post
                      Hong: So...Did you have a power supply that was wired incorrectly or was there just some confusion with schematics....Same question for Lowell.

                      Bob...... Slowly recovering
                      Attached Files
                      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


                      • #71
                        Re: 2x250 IRS2092 amp build

                        Originally posted by PWR RYD View Post
                        Lowell,
                        I'm curious if you can hear any difference between this amp and the other one you built using the two 16,000 uF computer grade electrolytic caps? They both use the same amp module. This one's cap bank should have lower ESR. I'm wondering if that is audible or not. Thanks.
                        Its really hard to say at this point Craig. In my small room, they seem the same. The motivation for this build was to have more power behind it. The first ran out of juice in my home theater during high transient movie scenes. It has 16000 per rail after a 650va toroid. This was meant to have 37000 after a 1000va toroid. The truth is, I don't really know how much capacitance I have. It will be simple to wire all the caps individually in parallel but not sure about grounding it. The schematic Hong posted shows a ground with between caps just like mine. Was said that it was right but mine is wrong. So confusing.
                        " 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/

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                        • #72
                          Re: 2x250 IRS2092 amp build

                          By the way, I measured 48vac on both secondaries and 65.3 vdc on v- and v+ with no load.
                          " 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


                          • #73
                            Re: 2x250 IRS2092 amp build

                            OMG I am hankerin' to build an amp like this. Lowell, the work is amazing and we are licky to have the big guns to prevent our ill fate. I would love to build a 500WPC amp. Are there any out there?
                            .

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                            • #74
                              Re: 2x250 IRS2092 amp build

                              Neil can easily tell you how to get the capacitance you want .. diagram wise. You may want to look in to tracing your current wiring so everyone is clear on what's happening and what should happen.
                              I am trolling you.

                              Comment


                              • #75
                                Re: 2x250 IRS2092 amp build

                                Originally posted by mzisserson View Post
                                OMG I am hankerin' to build an amp like this. Lowell, the work is amazing and we are licky to have the big guns to prevent our ill fate. I would love to build a 500WPC amp. Are there any out there?
                                " 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

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