awkwardbydesign

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About awkwardbydesign

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    I am not in the Hi-Fi trade

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  1. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    I considered heat shrink, but believe it would be too rigid, especially if you shrink it. Inner tube might work, but the curvature could be a problem.
  2. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    I would put a nutsert in the top plate, and use a locknut to keep the top bolt still, which would allow you to rotate the foot to raise or lower that corner for levelling. That's how mine works. Alternatively, lock the bolt into the wood and use a rivet nut or clinch nut) on the metal plate. https://www.google.com/aclk?sa=l&ai=DChcSEwiL1fD-icjjAhVHtO0KHf7CAMcYABAxGgJkZw&sig=AOD64_2hWyc-RZIJUHvQNFIkYJkjnmmrZQ&ctype=5&q=&ved=0ahUKEwiaguv-icjjAhXxrnEKHeQ3DqMQ9aACCKEB&adurl= or https://uk.rs-online.com/web/p/clinch-nuts/0827675/
  3. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    Will there be accelerometer measurements* of the effectiveness of these stands? With my quick and easy innertube stands, I found a reduction of about 75% comparing the the top plate of the stand with the floor measurement, using music. I haven't tried it with the sig gen, to see which frequencies are most attenuated. *Accelerometer app on phone.
  4. awkwardbydesign

    Dvdplayer for music is that recommendable on a low budget ?

    I have several DVD players, bought from charity shops. None cost more than £5, and they all sound different. They are in use in the two systems I have in the loft, one being fed into a Xiang Sheng 01A DAC, and the other straight to the amp. Both work well enough to enjoy the music. At those sorts of prices you could afford to try a few and see what you like.
  5. awkwardbydesign

    Magnepan LRS (Little Ribbon Speakers)

    That's not a ribbon, that's a different kind of planar.
  6. awkwardbydesign

    Shame!

    I don't understand it, but I have to use it, as most of my new music comes from downloads. Bandcamp in particular, but others too.
  7. awkwardbydesign

    Heybrook HB3 series 2 response measurements

    Thanks, I've seen that one. Some graphs would be nice, though.
  8. awkwardbydesign

    Heybrook HB3 series 2 response measurements

    Does anyone have a link to the measurements of the old HB3's frequency response? I'm thinking HiFi News may have tested them at some point, or even Heybrook's published figures. I have a pair (well, 2, sort of) and I picked up a cheap subwoofer*, so some numbers would be good. It would be possible, but not easy, to drag them down from the loft and set up a mic with REW. And as they will be used up there I don't know how valid that would be. They can't be used anywhere near a wall, so bass is lacking, and I've never played with a subwoofer, so thought it worth a play. *Mordaunt Short Alumni 9 - £40 so no real loss if it doesn't suit.
  9. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    That appears to give a resonance of 4.76 Hz. with 13kg. Double what I wanted, but still useful. http://hyperphysics.phy-astr.gsu.edu/hbase/shm2.html
  10. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    No argument there, but inner tubes are cheaper and easier, also they can be tuned with different pressures. Plus the same stands can be used for different speaker weights. I did find they were much less effective under electronics, probably because they were too stiff for the weight. This pair I have remade were probably just such rejects. I have been using two bike tubes at a time, with separate valves to achieve balance side to side, and move the speakers back or forward for front to rear balance. They will slowly deflate (or quickly when they fail!), but if I keep an eye on them and re-inflate to the same height they work OK. I have just come in from the garage, where I am making another pair, and the only cost will be for four new inner tubes. £14 posted. Eight springs coat me £80 five years ago, and that was cash in hand. The official price would have been considerably higher. Max's current designs are fantastic, IMO, but too expensive for me, especially as I can make something which will do a fair job. PS. What were the linking pipes you used?
  11. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    If you want to try the inner tube idea, here are some details from my current stands. I use cheap innertubes, as they are soft and seem to work well for this use. This is the make and size I use. The bases are 440mm x 370mm x 50mm, all 19mm MDF. Simply what I already had, with a bit of trimming. Big enough to allow me to move the speakers around on them for levelling. The top plate can be anything; I used what I had, but if the granite I also have had been the right size I might have used that. Each compartment for the tubes is 400 x 140, giving a circumference of 1080mm which fits the tube. If you change the overall size or shape, keep close to that circumference. They are 30mm deep which holds the tubes in but allows the tubes to stick up enough to work. When you have settled on the working height you might want to place some packing pieces, or stick on feet, in the gaps so if (when!) a tube deflates the speaker won't drop too far. Also stops kids rocking them dangerously. Leave some gap (3-5mm?) for normal movement. I haven't bothered, as there are no kids and my previous speakers weren't tall and narrow enough to be at risk.
  12. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    The original Seismic platforms used inner tubes. Not as saleable as the current spring based units, but easier for DIYers, and self damping. You adjust for different weights by pumping them up more or less.
  13. awkwardbydesign

    DIY Townsend Seismic Speaker Platform

    Very slightly off topic, but I remade the innertube stands today. I shortened the bases so the tubes fit better, cut a couple of tops (one is MDF, the other is chipboard) and the old tubes still hold air! I had to twist the tubes so the valves are on the outside, and then slide the speakers forwards a bit so the weight is central. They rock slowly and then stop. Hopefully they may reduce sound transmission to the neighbours, but at least I am re-using more of my old stuff. Another project that cost me nothing! The speakers next to them are genuine Heybrook HB3s, which were free apart from the refoam kit.
  14. awkwardbydesign

    How you can still travel about after the apocalypse

    Not too snowflakey; there appears to be nothing to lock them onto the rail, so leaning too far to the right would make life interesting. And short.
  15. awkwardbydesign

    Banana plug stuck in amp speaker post

    Did you examine the plug and discover the cause?