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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: confessions of a former damping freak posted by jfrago_52@yahoo.com on January 1, 2005 at 02:32:11:
a good example is my old Theta Gen III dac/preamp. I did not directly treat any chips. I did line the power supply box under the Theta with ERS cloth... Theta looks like a one box piece, however if you take off the bottom plate there's a shallow space for the transformers and some p/s electronics. Turns out this was behaving like a RF echo chamber. I put some small pieces in the corners of the upper box too, sort of on the theory that corners will be highly energized places. Anyway, the sound got hugely cleaner and more accurate sounding. One project I'm working on now is to take a 1/16" copper plate and epoxy it to the underside of a preamp... this is a twofold move, one is to add mass that isn't in the same ring mode as the steel box, and two is to stabilize the stray magnetic fields drifting around the steel case (the same reason non magnetic bolts in a toroid transformer clean the sound up nicely)...notice that copper rings are sometimes placed on the ends of expensive speaker magnets to stabilize "loose" magnetic fields. The design problem is the you have multiple energy inputs; mechanical vibration, magnetic fields of various origins, electrical fields, thermal energy, and RF energy all impinging on each other. These can be dealt with in a no compromise fashion at outrageous expense (like housing your dac in a a cnc milled box made from a solid block of copper) or you can use some clever physics smarts to get near.
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Follow Ups
- this depends a lot on what and where - tonemaniac 13:05:34 01/01/05 (1)
- Re: this depends a lot on what and where - jfrago_52@yahoo.com 14:13:05 01/01/05 (0)
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