Nevod
100+ Head-Fier
- Joined
- Jun 30, 2010
- Posts
- 250
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- 21
Quote:
Is anybody using closed-cell foam in any of their mods? I feel like someone has mentioned their usage of it before with the T50RP. I've read some reports that it works well in damping subwoofers.
Read up on that, interesting. At once read a bit on bass traps, made them and the proid's Helmholz resonator more understandable.
Though I'm afraid closed cell foam may have negative effect on high frequencies, increasing reflectivity there. IIRC, some more advanced soundproofing foams have two layers, top layer with open cells, bottom layer with closed cells. Or you can do it yourself by slapping open-cell over closed-cell, but it would be way too thick. The question of balance. Though if lining the whole cup is not required, then there shouldn't be any problem, as far as I see.
For the reference - modding without any reference and without even having any preferences is indeed problematic. I can only sort out obviousy problematic areas such as peaks and dips. Other than that, I don't really know. How much bass there should be, how much treble, etc. Though I think I can stick to equal loudness curves, though, and judge by them.
One more bit on the bass part and bracing enclosure - I've thought about putting an additional spacer over the rubber pads over the columns. Thought it may increase enclosure resonance frequency and resonance's Q. May be some more effect, I know about the techniques, but don't have enough time for real investigation on what results do they really make and how the results vary on the application. Didn't try it though, and not sure if I would be able to hear any result if there would be any at all.
Besides, in the Roundup thread, an jelly gasket sealant has been mentioned - may do a better job than plasticine due to better decoupling of baffle and cup. Though one would probably have to apply it around screws somehowas well to have effect, or there would still be rigid contact points.