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DIY Flat Panel Speaker Love

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  • Unbiasedsound
    replied
    Since last nov. I have been experimenting and combining XRK's foam board enclosures to my DML panels and it has improved the performance of all my panels especially in the bass region. Who would of thunk to use EPS foam to increase bass response. Props to XRK for this technique.

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  • Unbiasedsound
    replied
    I have used the Balsa and bass hobby wood that is tall and narrow around 2-3ft. but only 4 inches width and 1/8-1/16th thickness....They lack bass so it would best be used as a sat with subwoofer.....To achieve decent amounts of bass the panel would need to be at least 12"X12".

    Are bass and low frequency sound enhanced when using larger panels, SURE, but bigger is not always better unless you know how to properly utilize it in ones design....Too big of a panel will make the bass sound muddy and sluggish.

    In my opinion, DML/Bending wave technology is like throwing a pebble in a pond and watching the ripples flow to the edges....Bigger the pond the longer it takes for the ripples to reach the edge, the longer the bass travels the muddier/sluggish it will get if the panels are too big because it will take that much longer to reach the edge before stopping.

    Treble vibrations are weaker then bass vibrations so the bigger the panel/pond the weaker the treble vibrations get when it reaches the edges hence the diffused sound....the smaller the panel the more focus and pronounced the treble becomes as it has way less area to travel hence the reason why most conventional treble drivers are "SMALL".
    Last edited by Unbiasedsound; 08-04-2018, 05:28 AM.

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  • ameuba10
    replied
    has anyone tried it on a tall narrow board similar to a tower?


    also, looking at daytons buyers guide it states

    "Bass and low frequency sound are enhanced greatly when using larger panels or increased areas of substrate. Additionally, using a heavier substrate will allow deeper bass to be achieved, but at the expense of reduced treble output."

    With that being said, could one design a board with many perpendicular boards (think heatsink) to create a "subwoofer?"

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  • Ronin
    replied
    Originally posted by captainjack115 View Post
    Re: DIY Flat Panel Speaker Love

    I made some panels out of aluminum sheeting of few years ago, stuck some damping on the back. Not bad sound, good highs, less efficient though.
    Captain-- I'd love to know details. About how much less efficient? Size? Thickness of aluminum and EPS backing? Which exciters?

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  • Kornbread
    replied
    Originally posted by Ronin View Post
    Also, it seems like this would have been brought up by now (its impossible to read this entire thing) but just in case-- as any luthier will tell you, scoring and or sanding parts of the panel thinner will emphasize the modes flexing along those lines. Use to smooth out / taylor response. It's a more evolved version of simply putting weights on points.
    Scoring a thin metal is bound to have an influence on nodes, same with cutting grooves/channels in foam board. If we only had some kind of software to model these panels ...

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