There's the time factor involved reverse-engineering another company's IP. that's where DIY which can't copy an existing design verbatim can suddenly lose its attraction. Wherever time is money wherever plenty of trials consume their own coin in raw materials and rejects alone, never mind paying yourself a salary. What if it takes someone two years to experiment with different powders then percentile mixes of specific ones to arrive at their clearly effective recipe? A core appeal of DIY is money savings over commercial versions. Obviously we can't predict how effective generic crystal powder might be vis-à-vis Alkiko's special mix or for that matter, whatever exactly DR Acoustics, Shunyata, Synergistic and others use. Do you think that would work? FrancisĪs long as you work to electrical code to make it a safe device, it might be a worthwhile experiment. That has me wonder whether one could DIY a Corelli in a similar way by using crushed crystals instead of sand. I also read Roy Gregory's recent article on DIYing a sand-box anti-vibration support. I appreciate how you emphasized the conditionality of review findings and showed by clear examples how something that didn't work ideally in one of your systems did so well in another that you bought it. Hello Srajan, I just read your review on the Corelli. Or perhaps he did and got no satisfactory answers? Srajan I wish the presenter had asked Magnepan's Wendell Diller a lot more very specific questions. Again, it made the presentation quite generic. Neither were PSI's active bass traps mentioned as further successful solutions to common bass issues. Also, no mention was made of successful active speakers with cardioid DSP-adaptable bass à la Kii and Buchardt which already address the bass problems mentioned in fully integrated form to require no extra bass towers. I would simply say that for the time I spent watching this video, I felt rather shortchanged on actual hard intel on the Magnepan product. But, it's interesting that another manufacturer is working on a dipole bass solution. 1/ what are all the acceptable/useful placement positions? 2/ what is the actual LF response of -3dB and relative to what SPL? What is the recommended crossover point? By running well into the upper midrange, what kind of filter is involved to insure against excess amplitude where that bandwidth overlays the main speaker? How is the low, mid and upper bass adjusted relative to each other as the presenter claims is possible? Incidentally, my sub is actually a Ripol so cardioid version of a standard figure-8 dipole. Srajan, did you see this? With your dipole sub experience, this could be right up your alley. If I were you, I'd investigate their boards which should be more cost-effective than the Delta Extreme I tested and come in different sizes to install more invisible than big footers. For best performance however, I've so far not heard better than Wellfloat. Roller balls are load invariant up to their max rating and shy of deforming/cracking a bearing with too much weight, don't require maintenance. Viscoelastics must be used inside a particular weight rating so aren't one size fits all, then tend to suffer eventual fatigue to need replacement. Stillpoints use wire suspension for their racks but haven't scaled that down to anything compact enough to work as isolation footers. I'm simply unsure where outside of Wellfloat/Japan and Boenicke/Switzerland such solutions might be available. He too tried the three main approaches you mentioned to find wire suspension the most effective. Another designer/engineer recently emailed me about having come to the same conclusion. And, I find subwoofers most critical and telling so have looked into improving them the most. Yes, as I said in my review, the Wellfloat wire suspension-and by extension, the same should hold for Boenicke's SwingBase-has been the most effective such solution I tried yet. I could use some pointers on what to focus on. Do you now find that the wire suspension approach is superior to roller balls and viscoelastics? I'm thinking about following your footsteps on floor isolation against what's available locally. You have a real knack for finding unusual products. Srajan, interesting review on those Wellfloat triangles.
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