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Take the foam out the backs, just do it now, opens these up, decreases distortion, widens soundstage... I never thought it would make THIS MUCH difference, but it does.
Just be careful because it exposes the drivers to dust and debris. You can tape a piece of felt to the back of the driver to safely remove the foam while simultaneously making them sound more like the 660s. here is a guide: https://tinyurl.com/y8m9fzle
Not sure what you're trying tho get at?
I removed all of the foam and found the sound to be a huge improvement. If dust gets in the driver, can't I just blow out the dust?
Would be my thoughts exactly; however, the link above seems to indicate that some covering of the driver itself also improve tonal characteristics (make it closer to the 660s). I am in the process of getting the exact felt that was used in the posting and figuring out the best way to secure it to the driver... I'm hoping I can find the right size 3m double-sided dot and just hole punch a hole in it; otherwise it might be a bigger pain in the butt.
Thanks so much for the PDF! I just put the felt on... its magic! Even better! Thanks again!
Happy to help! I just recieved my pair today, how does the sound signature change, im debating whether I should do the mod or not
Better (smoother) bass (from mid-bass to bass extension), mellows out the highs, which get a bit echoey when you remove the outer foam. Removing the outer foam is a must to increase the soundstage and increase the clarity. Then the felt keeps the clarity of removing the foam, but solves the slight echo and mellows them out JUST perfectly! Soundstage is slightly smaller than without the felt, but I actually think the clarity increases and you get more separation. They just sound perfect this way. "AS IS" (stock)when shipped they were a bit "unclear" or "muddy"- the word I think fits best might be: "grainy." This solved all that! I eventually want dekoni fenestrated sheepskin pads, whenever that drop comes around again, but I'm afraid that a pad swap might make them worse. The sound is pretty amazing right now.
Where did you get the felt?
That imagine that jm showed is with the foam removed vs stock, theres no difference.
You can pick it up on Amazon or at your local crafts store
I have found felts yes, but not the kind SolderDude uses. He specifically used creatoligy eco fi 50/50 stiffened felt. I went to local craft store and they have creatoligy but no ecofi 50/50, amazon doesnt have it either.
Yeah idk theres definitely a huge auditory difference... and there's another pdf by hifi heaven that shows the differences between all the confirgurations... not sure what's up with his measurement rig, or where he would have gotten that from...
Michael's has it still at some locations... it's on clearance and they're not making more of it. When I found it they only had red left. So that's what I used. I still have most of it, feel free to contact me, I wouldn't mind mailing some out in an envelop if you want enough to make the circles.... or I guess I could just cut them for you.
I'll look at another location and see if I can find some, if not I will take you up on your offer, thank you for that.
What I did was take the removed foam pieces, and hold them against the outside of the grill, switch it back and forth and I can't hear a difference.
Yeah that shouldn't really do it bc the metal frame gets in the way first instead so you'll still have those reflection points no matter what. Also the felt covers the whole in the driver so that completely changes it as well if you do that... sounds like a completely different headphone, where as the foam just opens it up and gets rid of the mudiness a bit. Your music quality and amplifier matters as well. If your amp isnt powerful enough, you may not hear any difference just because of that.
I did the test before and after felt mod. I am currently streaming from Spotify annd use a schiit stack.
No clue, then. I'd check to make sure Spotify is on high res. and maybe try an upgraded dac? I haven't heard a schiit stack myself, but from reviews, my understanding is that its not the highest resolution and maybe somewhat muddy itself. That amp should have plenty of power though, and some people say "a dac's a dac" so who knows? Sorry its not working out for you like it has for me!
Spotify is on high quality and doesnt have normalize volumes on either. The problem with standard schiit modi 2 is that it runs off usb power, if you have bad usb power then it becomes a bad DAC. Amp wise I haven't heard any problems with it regarding reviews. I love my headphones, i just didnt hear a difference in only removing the foam. Also, I have tried a few craft stores and have looked online and can't find that felt. Is there a way to private message you to see about getting that extra felt you have?