Okay, just wanted to report on a little experiment:
I inserted some of the "Eartip Adapters" that come with Monster Supertips (remember them?) into the nozzle of the EX1000. It turns out they are the right size and fit pretty well. This compresses down the foam filter.
Results: Inserting this makeshift filter makes the EX1000 much darker - darker than even the 7550 / EX800ST. If you ever wanted to make your EX1000 tuned for pop or electronic music, this would be the best way. I didn't like the change, but doing this confirmed a few things for me:
1. The foam filter in the nozzle really is just a cylinder of foam. It is somehow fixed at the back of the nozzle at the base.The tip adapter can be removed with something like the earwax loop cleaner in the picture and then the compressed foam can be teased back up the nozzle to sit flush with the rim.
2. The foam filter is clearly not a user-replaceable part. Be gentle with the teasing.
3. I do not know if the foam filter can be pushed all the way into the driver (which would be A Bad Thing).
4. I cannot guarantee that in this case the foam would not naturally decompress by itself and at some point push the supertip adapter out, perhaps right into your ear which would be A Bad Thing).
5. It would be possible to consistently tune the sound of the EX1000 by removing the foam filter entirely and replacing it with a acoustic filter, if one had a filter of the correct diameter. (I'll double check my friend's PFE's to see if they could possibly fit. Maybe the K3003i filter?)
If you are wondering why I'm doing this it's because I find I like my 7550's more, but wish I could compromise between the cleaner sound of the EX1000 and the more forgiving sound of the 7550.
1. Yes, it is just a cylinder of foam that's somehow tied together with a part of a nozzle, learned this from opening a EX600.
3. Don't think so.
4. It will compress but then you can pull it back to a normal shape.
5. You can just add a bit more foam, or use layer of RE0 filters, there may be a sweetspot.
It will be possible to have something in between the 7550 and EX1000, by dampening the 1000s a bit. Rin and I have mods planned for the EX1000 which James donated, it will be a bit as he's booked for now. EX1000 may benefit from some dampening, which would make it more like the 7550, but with more bandwidth. EX1000 can be made more like the 7550, while the 7550 cannot be more like the EX1000, that's one of the reasons why EX1000>7550, its clearly the same driver but with a better diaphragm.
Edited by Inks - 3/16/13 at 5:17pm