Originally Posted by ericr
Do you know the output impedance of the M-Stage? If it's under 1 Ohm I would be interested in your opinions of the V8 and D7000 when powered by the same gear.
The output impedance of the M-Stage is 5 ohms, I tried the V8's with it at minimum gain and while there was no noise, the frequency response was negatively impacted and they didn't sound that great. However, the D7000's are very low impedance and high sensitivity for a full size headphone (25 ohm 108db) so I was able to listen to them with the iPhone 4 (though at almost full volume). Even with the same gear there wasn't really much of a competition, the D7000 sounds significantly more real, clear, reveals more details, is more textured, more balanced, natural, and generally sounds better, though does have a very minor issue with being a bit sibilant. The D7000's don't perform quite as good with the iPhone as with the M-Stage (one of the most popular amps for the headphone), but the difference is fairly minor compared to the difference between the D7000 and V8.
It's a real shame, I absolutely love the portability, comfort, and ease of use of the V8's. I also love how awesome 1964 Ears is as a company, their customer service is awesome, the're fully based in the US, and they've been nothing but super awesome to me. And I'm not saying the V8's are bad, they're probably just not my cup of tea. The D7000's are a very difficult test to pass, they're one of my favorite headphones. For example, I have a pair of LCD-2's that I barely use because I'm listening to my D7000's (though I would say the LCD-2's are also better than the V8's IMO, I was originally going to sell my LCD-2's to fund the V8's, the LCD-2's are too uncomfortable to use for very long).
Keep in mind, that I've never tried an IEM that I've been happy with. The V8's were by far the closest, though. For example, I owned the Hifiman RE-600's ($400) and I thought they sounded like $100 headphones at best. I've been wondering if there's something wrong with my ear canals that causes IEM's to perform poorly for me, but nothing I've tried to "open" or change the shape of my ear canal has helped. If you like IEMs at all, there's no reason to worry because of my experience.
I'll most likely be sending the V8's back tomorrow, and may demo the V6's or V6 Stage soon, but first I'm going to try out the NAD Viso HP50's.