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MomoTon

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MomoTon last won the day on August 18

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  1. the acrylic is 25mm (and about 10kg haha) and has a tongue on its 3 sides. the side panels and the top plate were slotted, there you can also see the epoxy edges we had to cast, as popplar is really soft. to fix the brazings on the front we made external 5mm acrylic tongues and slotted the brazings as well as the acrylic front
  2. after 4.5 months of preperation and four 12h days for assembly, we finished our second skram, the first one world wide with an acryl glass front? We didnt measure the weight yet, but although the front has about 12kg, it feels a lot lighter than our prototype made of birch, as we used popplar instead. It also feels rock solid due to the carbon-epox enhancement on all surfaces and edges, but the measurements will show if the light material has any disadvantages...
  3. Wellif we would change tuning and the relationship, I think we will stick to the original design and re-cut all the internals to 574mm... Yesterday we started with the cf layer on the side panel... with a massive cross and a frame on one side (later the inside), and a recessed drive-in nut on the other side, we pull the panel vie a m12 bolt towards the cross. After the cf layer, this nut should be hidden in the panel. The same way we will also insert more drive-in nuts on the bottom of the side panels, as well as in top and bottom panels... Instead of the cross, we are then easy able to screw Handles in and out, attach stands and even a easy detachable metal frame is planed for transportation. Instead of handles or feet, we are also able to use Pins to stack two skrams precisely, and to fix them together, without lashing straps. I´m not sure if this level of details is ok in this thread, i don´t want to overload it, but i think this way of making detatchable handles may be interesting for some others too.
  4. I finished my first skram some months ago, which was only a prototype and reference built for us. The next 2 skrams shall be absolutely high end- not only in terms of it´s fantastic bass, but also in manufacturing. They will not be made of 18mm birch, but poplar. Due to the lower density and stiffness, we will overlay all the panels with carbon fabric and Epoxy. To get the side panels even stiffer, we will pre stress them (seen in the first picture) and overlay the stressed panel with carbon, when we press it flat again, the carbon on the outside of the skram should have enorm pre-tension. Due to this this pre-stress, we hope to reduce enclosure resonances to a minimum. (our tests look good so far, I will post them, if we have final results if one is interested.) We should be able to save 15-20kg+ and hopefully still have a resonance-dead Enclosure. There will be also other crazy features like a transparent 25mm acryl glass front or detachables handles. As the brazings behind the front will be seeable, we want to re-design them, seen in the second picture. We removed material from the corners, as they should be stiff enough through. See you any problems concerning those brazings? main question is about the enclosure size. I read somewhere in this Thread that it should be possible to make the skram a slimmer, but this would reduce the Output... Is it also possible to increase the witdh to gain some more output, but to hold all the other dimensions the same? How much gain could we expect (i.e. with +10cm), and would have the same tight bass? //edit: I forgott to say hello to all, and to thank you, Josh, for all the work you have put into your designs and the all the work around them... A friend I'm doing this project together with, posted some months ago ... We still don't know much about sound, but we learned a lot since summer haha
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