Dynamat Xtreme & Fiberloft Mountain Mist Mod
Here we go again!
So far this mod is very very promising.
It consists of a sheet of Dynamat Xtreme: http://www.dynamat.com/products_auto...at_xtreme.html
And some Fiberloft Mountain Mist Polyester filling: http://www.reprodepotfabrics.com/fblfffl.html
The Dynamat Xtreme is a thin anti-vibration material (1.6 mm thick) that is commonly used in car stereo installation to cancel out road noise and vibrations, giving you a quieter ride and quieter background for car stereo listening. It is supposed to turn vibration into heat that just disipates away.
The Fiberloft Mountain Mist is sort of like cotton, only courser and made of special polyester that is alleged to have superior acoustical properties and is used in many speakers.How To
Take your sheet of dynamat and draw around the edge of your earcup and cut out an apporopriate circle. Cut little notches in each of 4 corners to accomodate the lip with the hole for the screw. Peel off the backing and stuff the Dynamat into the ear cup.
Now I add a little bit of damping to the driver itself. Cut a long, thin strip of Dynamat and wrap it around the portuding outside of the "butt" of the driver. Then take another small circle of Dynamat and attach it to the rear of the butt of the driver, but, and this is IMPORTANT-- leave a hole (approx. the same size as a hole in a piece of 3-ring binder paper) in the center. If you brush your finger on the rear of the butt of the driver, you will feel a small hole, presumably to allow aur to escape behind the driver. You do not want to cover this up.
You could go crazy and cover up the whole of the rear of the driver assembly, but you will note it's full of holes, which I can only presume serve some sort of acoustical function, so should probably not be covered up.
Now, lightly fill up the remaining space in the ear cup with the Fiberloft. I would say, don't be too aggressive with it, just use a moderate amount, so you can still easily close up the ear cup and attach to the driver assembly. (Sorry, I have no pic of this).
Re-attach everything back up, and voila!
I've only had 90 min with this mod, but I've put it through all the torture tests and this one is sounding like the best so far by a wide margin, but I want to listen more before I decide.
The least attenuation of bass volume and impact, will make the skeptics happy. Yet, the degree of bass tightening is very very significant. It's dramatically more steady and solid than stock.
Unless I start to hear some dramatic problems, this may be where I park it, and stop. I'll follow up later tonight with more thoughts as warranted.