Ah no doctorjuggles, the seals are fine.
Ok, here's my final verdict. Is it going to be good or bad?
I'm pleased to say that after a few hours of listening, I think they are amazing. Which is why I was stupid for posting 5 minutes after hearing them. Well,you know what it's like. You buy new phones and want to immediately share the news with head-fi, haha.
I just listened to a live dave weckl CD, and it sounded incredible. There's absolutely tons of detail, I can hear every minute thing. On that CD, on full volume,( just testing it), there was no distortion, except towards the end of a tune when the whole band was rocking. And even then, I tested it with full bass boost. To be honest, the fullness comes through for me on full bass boost. The attack of the drums sounded right. With no bass boost, it sounded fine, but I felt presence was missing on things like cymbals. And just a general lack of excitement and some hollowness. Some here would think the treble on full boost was too much, but I'm definitely a treble head anyway, so I love that.
I tested a dance music CD, just 4 to the floor house beats. That, on full volume and bass boost 1, also sounded great, nice and bassy, and no discernable distortion, although I could tell it was there on some tracks, but nothing bad.
My other CD's I tried, mainly soul/funk male and female vocal stuff, couldn't handle full volume, and only barely with no boost at all.
So, I'm happy with these earphones. But I'm still interested to know if there are other in ear phones that sound as good as these, but which are more powerful, and wouldn't distort at full volume. For most things I heard, in my opinion, full volume wasn't ridiculously loud. I know it's not the audiophile way, but if I could, I'd listen to everything with boost on, it just sounds better to me.
Off topic for a moment, an interesting thing comes from this in relation the sound of the 580's. I've always thought that piano and guitar sound a bit woolly on the 580's. When I heard piano just now with full bass boost on the EX71's, there was clarity! Clarity to the attack of each key that represents to me what a piano really sounds like. This makes me want to try the CD3000 even more from what I've been hearing about the treble extension they have.