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DIYowa 2009 is in the books

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  • #91
    Re: DIYowa 2009 is in the books

    Originally posted by JonS View Post
    Hey everyone, Scott's "little" brother here. I wanted to stop by and thank everyone that worked to put on the event, it was a great time and a great chance to get to hear others hard work. I've had a chance to install soundeasy and play with it a little bit and I definitely have ALOT of reading and experimenting to do.

    I finally got around to doing all the post processing and got all the photos i took posted onto the web. So if anyone is interested in some more pics of the same speakers feel free to have a look.

    http://picasaweb.google.com/JonSehlin/IowaDIY2009#

    Jon
    Still owe ya a slap in the face with a pizza box :D. It was great meeting ya though, Jon. Glad you made the trip and I hope to see everyone again next year.

    shawn
    My favorite woofer is a Labrador retriever.

    Comment


    • #92
      Re: DIYowa 2009 is in the books

      Hi All,

      For starts I want to thank all of the Iowa 2009 attendee's for their constructive criticism to my Copper Project. Much has been made of the Tang Band W5-1685's performance in that project - it did turn a few heads! Combined with the Vifa XT25SC90, they make a pretty nice team.

      A couple of you mentioned that the midrange seemed a little laid back and I agree with that. Dirk mentioned that we may have engineered a little too much BSC - no argument, but how to deal with that? Two ways, and it only made sense to pursue the less aggressive route first. Now it might have been logical to head back to the PCD and rework the low pass filter, but it seemed easier to modify the box stuffing and hear what we would hear. One aspirin vs the whole bottle, as it were.

      I removed about 1 oz. total of AcoustaStuff equally from either side of the interior divider and they ended up being just a little shouty (well maybe more than a little). So I rebalanced the stuffing along both sides of the internal baffle, added back about half of what I removed and got exactly what I wanted. Maybe I had the balance wrong in the first place...don't really know. (Sidebar: Paul, we have about 7.5 oz per cabinet, now).

      The Coppers are now smoother across the lower frequencies (<150 hz) which also helped opened up the midrange, so now David Crosby and Donald Fagen don't sound like they're enduring their 48-year colds anymore! Heck, even Amy Winehouse sounds a little less strung out.

      Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!

      Comment


      • #93
        Re: DIYowa 2009 is in the books

        Nice pictures of the work this year. Just an amazing collection of designs all around.
        No matter where you go, there you are.
        Website

        Comment


        • #94
          Re: DIYowa 2009 is in the books

          marty, boast away. you mention the bsc. is this reasonable considering they were 3meters or more from the back curtain at iowa? what conditions, room, placement ect, did you have when you ajusted the stuffing?
          " 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


          • #95
            Re: DIYowa 2009 is in the books

            Originally posted by martyh View Post
            Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!
            I like the fact that they're totally non-fatiguing. I'm pretty sure you could listen to them at paint-peeling levels for hours without getting tired of them.

            Comment


            • #96
              Re: DIYowa 2009 is in the books

              Originally posted by Dirk View Post
              I like the fact that they're totally non-fatiguing. I'm pretty sure you could listen to them at paint-peeling levels for hours without getting tired of them.
              I doubt you can get any 5" based system to get to paint peeling levels, especially one with, at best, a mid 80s sensitivity level.

              Add a sub and high pass the system at 80Hz and you might move toward that goal . . .

              ;)
              R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
              Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

              95% of Climate Models Agree: The Observations Must be Wrong
              "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

              Comment


              • #97
                Re: DIYowa 2009 is in the books

                You've reduced the stuffing density 10% or so and that's fine. In a 3-way where the woofer doesn't cover much if any beyond the bass range and is the only driver loaded by the TL, there would not likely be a situation like this. But in a 2-way with the midwoofer in its TL covering bass and midrange, changing the stuffing density will definitely impact how the midrange sounds since the stuffing affects higher frequencies much more than lower frequencies. Nothing at all wrong with making adjustments like this to suit you and make the sound better.
                Paul

                Originally posted by martyh View Post
                Hi All,

                For starts I want to thank all of the Iowa 2009 attendee's for their constructive criticism to my Copper Project. Much has been made of the Tang Band W5-1685's performance in that project - it did turn a few heads! Combined with the Vifa XT25SC90, they make a pretty nice team.

                A couple of you mentioned that the midrange seemed a little laid back and I agree with that. Dirk mentioned that we may have engineered a little too much BSC - no argument, but how to deal with that? Two ways, and it only made sense to pursue the less aggressive route first. Now it might have been logical to head back to the PCD and rework the low pass filter, but it seemed easier to modify the box stuffing and hear what we would hear. One aspirin vs the whole bottle, as it were.

                I removed about 1 oz. total of AcoustaStuff equally from either side of the interior divider and they ended up being just a little shouty (well maybe more than a little). So I rebalanced the stuffing along both sides of the internal baffle, added back about half of what I removed and got exactly what I wanted. Maybe I had the balance wrong in the first place...don't really know. (Sidebar: Paul, we have about 7.5 oz per cabinet, now).

                The Coppers are now smoother across the lower frequencies (<150 hz) which also helped opened up the midrange, so now David Crosby and Donald Fagen don't sound like they're enduring their 48-year colds anymore! Heck, even Amy Winehouse sounds a little less strung out.

                Anyway, I just wanted you all to know that the modification is complete and so is the project. Not being boastful, but it's about the best $220 you'll spend on a project. Thanks for the input guys!

                Comment


                • #98
                  Re: DIYowa 2009 is in the books

                  I doubt you can get any 5" based system to get to paint peeling levels, especially one with, at best, a mid 80s sensitivity level.
                  Sit closer. ;)

                  Comment


                  • #99
                    Re: DIYowa 2009 is in the books

                    Originally posted by Dirk View Post
                    Sit closer. ;)
                    Headphones? :D
                    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                    95% of Climate Models Agree: The Observations Must be Wrong
                    "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                    Comment


                    • Re: DIYowa 2009 is in the books

                      Originally posted by [email protected] View Post
                      marty, boast away. you mention the bsc. is this reasonable considering they were 3meters or more from the back curtain at iowa? what conditions, room, placement ect, did you have when you ajusted the stuffing?
                      They went through about 4 weeks of auditioning in my home - both medium and small sized rooms - as well as their 10 Minutes of Fame in Iowa. In all three venues they were a little big bass-wise and muted in the mids, hence the tweaking. Got'em where I want them now. They happily reside in my bedroom for the duration (a smallish room with way too much overstuffed stuff).

                      As for the rest of the comedians on this thread...chuckle on boys!

                      Comment

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