CYoung234,
With my preferred mods (stock white driver felt in place, Paxmate in the cups, plasticine in the baffles, stock black bass port felt in place covering all 4 vent slots, and Paxmate donut under the ear pads) I was able to sonically match their sound signature by substituting "3M Nexcare flexible clear tape (3M Transpore) in place of the T50RP stock white driver felt. This tape may be your solution if you mangled your stock white driver felt and want an equivalent to take yours back to stock SQ. As always, your results may differ.
New and Improved BMF's - Modded set #4
Paxmate Plus in cups, Claytoons plasticine in baffles, Stock white driver felt removed, 3 layers of "3M Nexcare flexible clear tape ( aka Transpore )" over the back of the drivers, furniture bumper for reflex dot at center position of driver grid, Stock black bass port felt in place and no additional bass tuning, and a ring of Paxmate under stock ear pads.
Comparison of BMF mods #4 and CYoung234 mods:
My Comparison set #4 closely matches the sound signature I prefer: Clear, balanced, and wide soundstage; deep, textured, fast sub-bass in ample quantity that is well controlled without bleeding over into the mids; warm, full, silky smooth and detailed mid-range as if sitting two or three rows back from the center stage; clear, detailed treble extension without fatigue.
My set duplicating CYoung234's mods: The CYoung234 soundstage is similar in width to BMF #4 but depth is pushed back way too far; instruments and vocals sound like I am sitting at the back of the theater 30 or 40 rows from the center stage. The sub-bass is significantly diminished in quantity but not so much in quality; the bass is still textured and fast but not as prominent. The mid-range is significantly attenuated, compressed, and thin; instruments and particularly vocals sound hollow. The upper mids and treble frequencies are extremely exaggerated making this set Hot and fatiguing to my ears.
Conclusion: Your mods do not offer the SQ and signature I prefer. I am happy, though, if your mods provide the SQ and signature you prefer.
Next, I will try one layer of 3M flexible clear (3M Transpore) tape over the stock white driver felt.
Cheers,
BMF
Edit 1: I think that placing 3M Nexcare gentle paper tape (Micropore) and a reflex dot over the stock white driver felt markedly increases back pressure, reduces air flow, and limits diaphragm excursion too much producing the sound signature and sound qualities I described after implementing CYoung234's mods.
Edit 2: I removed the 3M Nexcare gentle paper tape (Micropore) and reflex dot. Everything else remained the same. I placed one layer of 3M Nexcare flexible clear tape (Transpore) over the stock white driver felt. Transpore had no negative effects compared to the problems caused by Micropore in this set-up.
Transpore tape over stock white driver felt is a mod worth trying if your stock white driver felt is intact and you want to decrease the bass quantity (no effect on quality of the bass), move the vocals and mids to the 3rd or 4th row from center stage, and increase treble brightness. I think the more favorable results achieved with Transpore, instead of Micropore, over the stock driver felt is due to only slightly increasing back pressure, minimally restricting air flow, and slightly limiting diaphragm excursion compared to stock. Note: Transpore tape has numerous perforations whereas Mircopore has none. As always, your results and opinions may differ.
