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1st Boombox Project - The Madeleine

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  • #46
    Re: 1st Boombox Project - The Madeleine

    The isolated DC-DC converter is to prevent groundloop right? You can use a groundloop isolator in the line-level signal. It's basically a 1:1 input trafo and eliminates unwanted noise.

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    • #47
      Re: 1st Boombox Project - The Madeleine

      Yes just wire it inline. I believe it does isolate a ground loop, however I have bad luck with car audio ground loop isolators. It seems that they reduce but don't eliminate the noise.
      Melby Audio - Flat Pack Speaker Kits

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      • #48
        Re: 1st Boombox Project - The Madeleine

        Originally posted by Melby Audio View Post
        Yes just wire it inline. I believe it does isolate a ground loop, however I have bad luck with car audio ground loop isolators. It seems that they reduce but don't eliminate the noise.

        Thank You! I did try a car audio ground loop isolator with zero luck. I ordered a 1w and 2w model. I am actually in. Fort Worth this weekend but don't have time to stop on the way back down south. If this works or reduces the noise that would be wonderful. I am hopefully going to go take a look at some different wood this afternoon. I really appreciate the help Melby.
        "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

        The Madeleine
        The Roxster
        Swopes 5.0
        Acoustic Panels
        Living Room Make Over

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        • #49
          Re: 1st Boombox Project - The Madeleine

          After we got home this afternoon, I took a trip to Dakota Hardwoods. I picked up 11 bdft of mahogany and 11 bdft of soft maple. I was rather shocked by their prices. They were significantly cheaper than the big box stores of course.

          I did not price the red oak they had, which of coarse was much better wood, but the Mahogany board was $58. I spent ~$85 on red oak at Lowes for one cabinet. This puts the build cost for one cabinet out of mahogany at $29. It is cheaper to buy the hardwood than MDF and veneer. I kind of wanted to get into learning how to veneer but at these prices it may not be worth it. They also had cherry, alder and other exotics. I really wanted to see some of their burled maple but was afraid I might end up leaving with 3 boards not 2.

          Since the wood is sold by the board foot it is 13/16" thick. I will have to buy a surface planer to get the wood to 3/4" as well as finish the rougher surface. A planer will also allow me to work with 5/4 boards and bring costs down further.







          "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

          The Madeleine
          The Roxster
          Swopes 5.0
          Acoustic Panels
          Living Room Make Over

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          • #50
            Re: 1st Boombox Project - The Madeleine

            Awesome execution!
            .

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            • #51
              Re: 1st Boombox Project - The Madeleine

              Originally posted by Gordy View Post
              After we got home this afternoon, I took a trip to Dakota Hardwoods. I picked up 11 bdft of mahogany and 11 bdft of soft maple. I was rather shocked by their prices. They were significantly cheaper than the big box stores of course.

              I did not price the red oak they had, which of coarse was much better wood, but the Mahogany board was $58. I spent ~$85 on red oak at Lowes for one cabinet. This puts the build cost for one cabinet out of mahogany at $29. It is cheaper to buy the hardwood than MDF and veneer. I kind of wanted to get into learning how to veneer but at these prices it may not be worth it. They also had cherry, alder and other exotics. I really wanted to see some of their burled maple but was afraid I might end up leaving with 3 boards not 2.

              Since the wood is sold by the board foot it is 13/16" thick. I will have to buy a surface planer to get the wood to 3/4" as well as finish the rougher surface. A planer will also allow me to work with 5/4 boards and bring costs down further.

              Seeing this beautiful lumber has me itching to do a new all out build.
              Builds - C-Killa - Speedsters - LithMTM - Talking Sticks - Pocket Rockets - Khanspires - Dayton RS Center - RS225/28A - Kairos - Adelphos - SEOS TD12X - Dayton 8 - Needles - 871S - eD6c - Overnight Sensations - Tritrix (ported) - Lineup F4 - Stentorians - The Cheapies - Tub Thumpers - Barbells - Tuba HT - Numerous subwoofers - probably missing a few...... :p

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              • #52
                Re: 1st Boombox Project - The Madeleine

                Nice job! Have all the parts lined up to do something similar, but using a Pyle amp. Looking to upgrade a Sprite that I made. You've given me some great ideas, gotta do a charity job first and then jump on in...hope it comes out as well as yours!

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                • #53
                  Re: 1st Boombox Project - The Madeleine

                  Originally posted by Melby Audio View Post
                  Yes just wire it inline. I believe it does isolate a ground loop, however I have bad luck with car audio ground loop isolators. It seems that they reduce but don't eliminate the noise.
                  I got the part today and wired it inline per the instructions. I don't think it really made much of a difference. I would say the data noise was reduced some but not all the way. It only take a little volume to get past it.

                  I have ordered 2 Sure APT-X BT 4.0 Receivers from Sure in China.

                  http://store.sure-electronics.com/audio/aa-ab41136

                  They have both shipped and should arrive on the 27th. Sure sells 2 BT modules, one that PE carries, and the APT-X that is specifically designed to "eradicate RF and digital signal interference..." I really don't know WHY PE does not sell these and other BT modules. The one they do sell Part # 320-351 seems to be on eternal back order.

                  If the fine PE folks are reading this please offer the Millennia BT module and the new Sure APT-X Bluetooth 4.0 Audio Receiver SKU: AA-AB41136. They would not doubt be great sellers.
                  "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

                  The Madeleine
                  The Roxster
                  Swopes 5.0
                  Acoustic Panels
                  Living Room Make Over

                  Comment


                  • #54
                    Re: 1st Boombox Project - The Madeleine

                    Hmm, yeah must be the BT module then. Is it a 12v or 5v module?
                    Melby Audio - Flat Pack Speaker Kits

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                    • #55
                      Re: 1st Boombox Project - The Madeleine

                      Originally posted by Melby Audio View Post
                      Hmm, yeah must be the BT module then. Is it a 12v or 5v module?

                      It is a 12v module. I have Fusion BT100 that is also a 12v module that encounters the same data feedback. If I go 1/8" headphone to RCA direct, there is no noise. So yes, it is the BT module. This is why I am hoping that the new Sure BT module will fair better. It is not a deal breaker if I cant clear it up but I would like to exhaust all options. Worst case i guess i could find a 5v module and use a DC-DC converter for 12v to 5V and try that. Do you have any suggestions or preferences for 5v BT module? I have a few weeks before the Sure BT units arrive and I am willing to try other options.
                      "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

                      The Madeleine
                      The Roxster
                      Swopes 5.0
                      Acoustic Panels
                      Living Room Make Over

                      Comment


                      • #56
                        Re: 1st Boombox Project - The Madeleine

                        Out of curiosity - are you using an iDevice? If so, you might consider spending up for the AirEnabler:
                        http://airenabler.qnology.com/

                        Airplay is lossless and much better quality audio than Bluetooth (even APT-X).
                        DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
                        The Aria's - RS150-4 (or RS150-8) + XT25SC90
                        The Mariposa's - TEBM65C20F-8 + ND16FA
                        The Canzonetta's - RS100P-8 and ND16FA
                        AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

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                        • #57
                          Re: 1st Boombox Project - The Madeleine

                          Originally posted by tyger23 View Post
                          Out of curiosity - are you using an iDevice? If so, you might consider spending up for the AirEnabler:
                          http://airenabler.qnology.com/

                          Airplay is lossless and much better quality audio than Bluetooth (even APT-X).

                          Yes I am, but I do not want to have the box dedicated to the iDevice platform. I also want to have all components mount inside the box for a single plug solution. I will be researching the AirEnabler more for a possible other application. Thanks for the info.
                          "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

                          The Madeleine
                          The Roxster
                          Swopes 5.0
                          Acoustic Panels
                          Living Room Make Over

                          Comment


                          • #58
                            Re: 1st Boombox Project - The Madeleine

                            Believe it or not I have had good luck with the $7 usb stick looking cheapies off of ebay combined with the Murata DC-DC. I have also used a Target clearance off brand, and a Phillips unit. All were good once the DC was isolated, and all were problematic using standard voltage regulators. I also have both the 12v and talking ones that PE sells, but I still need to test those before I can say how well they will work or if they have ground loop issues.
                            Melby Audio - Flat Pack Speaker Kits

                            Comment


                            • #59
                              Re: 1st Boombox Project - The Madeleine

                              Originally posted by Melby Audio View Post
                              Believe it or not I have had good luck with the $7 usb stick looking cheapies off of ebay combined with the Murata DC-DC. I have also used a Target clearance off brand, and a Phillips unit. All were good once the DC was isolated, and all were problematic using standard voltage regulators. I also have both the 12v and talking ones that PE sells, but I still need to test those before I can say how well they will work or if they have ground loop issues.

                              I am ordering the parts today to implement the above. I found that a floppy drive power cable has .254 pin spacing the same as the DC-DC converters. This will make it easier than just soldering wires on. My goal is to have the least number of parts and connections as possible. I am hoping the Sure BT modules will be the answer. But if the above works and solves the problem I will be just as happy.

                              Thanks for the guidance and I will post my findings when I get the parts.
                              "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

                              The Madeleine
                              The Roxster
                              Swopes 5.0
                              Acoustic Panels
                              Living Room Make Over

                              Comment


                              • #60
                                Re: 1st Boombox Project - The Madeleine

                                Interesting find today. I was getting the parts list put together for The Madeleine and was looking up the Shc 40 1-1/4 parts # at Home Depot. In my search results on the depots site, I saw PVC pipe by Formufit. It is a furniture grade PVC company. They have several different colors of PVC including black. The price is not bad either.



                                I emailed them a few min ago to inquire about their 1-1/4" pipe as they stated it meets Sch 40 standards. I could not believe it but on a Sunday I got a response. The ID of their 1-1/4" PVC pipe is 1.360. Only a .015" deviation from the 1-3/8" needed. I never liked the white PVC port and wanted it black but did not want to hassle with painting it.

                                I ordered (2) 3ft sections and will post pics when it comes in. If this works, it will be a better alternative than white PVC especially for those of use who prefer to flush the port in the front to back of the enclosure.
                                "A dirty shop is an unsafe shop, if you injure yourself in a clean shop you are just stupid" - Coach Kupchinsky

                                The Madeleine
                                The Roxster
                                Swopes 5.0
                                Acoustic Panels
                                Living Room Make Over

                                Comment

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