I tried these on the 400's. Attenuated the high's and the upper mids a bit too much to my liking. Much prefer the Comply TS-400's.
They are pricey and wear out from what I've read. Any silicone solution that doesn't mess with the sound too much?
I've heard good things about the Auvio's from Radio Shack.
Also, if you check out HifiMans site, they have a new set of silicon's for the 400's that were not available before. It's the same set that's offered for the 600's.
Are they including those in the RE400 now? A HiFiman rep sent me this:
"And a carry pouch and several extra eartips are included."
This was in reference to the earlier runs of RE400 (build quality and accessory issues they were having).
Yes, new RE400 come with all of the tips shown in the link posted above, plus two pairs of Comply T400 (1M/1L).
I'm not sure I totally like these... the vocals are too forward and seem generally louder than the rest of the music on some albums. I just got them today, so we'll see if they grow on me.
They have a warmer signature that is more musical than the RE0. Regarding build quality, it's too early to tell how long they will hold up, my original pair has held up well since I got it, haven't run into any issues yet with it. Others have stated otherwise recently. The sound though, is really great for its price.
They aren't as bright as the RE0s if that's the information you'd like. The treble is more controlled, but strong enough in terms of brightness.