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Originally Posted by AzNyCans /img/forum/go_quote.gif
I rarely post anything, I just like to educate myself, but I had to write a response to this Bilavideo. You smell b.s.? This is an enthusiast website about headphones, hi-fi and other various audio components. You think someone would lie about hearing a headphone? Wow. Also it is an armature driver, this has never been disputed. Read the website if you need to. If you have nothing constructive to contribute to the thread, why don't you just keep it to yourself? Mmkay...
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Hello, from "this Bilavideo." When did I suggest that someone was lying about hearing a headphone? If I was mistaken about the driver, that's a call for a correction, not an accusation. I think a little skepticism is healthy, but about product claims, not about people posting on a thread. If it's a bit confusing, that's because there are these two boxes into which earphone drivers generally fall: balanced armatures and dynamics. Calling one's driver a "dynamic armature" (or as Grado puts it on his website, a "moving armature") creates more confusion than clarity.
I'm operating from a framework where there are these two approaches: balanced armatures and dynamics. The BA's come in single-, double-, triple- and even poly-driver formats. The dynamics, to the best of my knowledge, only come in single-driver formats. With the exception of some of the single-driver models, the BA's use a similar architecture, much like that of a hearing aid, with the drivers residing in some kind of shell that fits into the hollow of the outer ear, connected to an earpiece that goes into the ear canal via a sound tube running somewhat diagonally from the shell to the earpiece. The dynamics, because of their size, fit more like the earbuds, perpendicular to the ear canal, except they attempt to form a complete seal.
There's no question that Grado is selling an earphone that runs off a single driver and has an architecture more resembling the dynamics than the BA's. I don't see any product literature that says he's advertising a balanced armature, just references to this driver as either a "dynamic armature" or (as he has on his website) a "moving armature." Honestly, I've never heard of a "dynamic armature." Calling it a "moving armature" is just another way to say the same thing since "dynamic" means (more or less) "moving." But what's moving? If it's the "armature" itself, that sounds a lot like other dynamics, where a membrane moves back and forth. Is Grado saying he has invented a third kind of driver - one that is neither a balanced armature or a dynamic, or perhaps one that synthesizes the two in some unheard of way?
I'm willing to admit that this is all still a bit confusing to me. Your rebuke, while accusing me of something, doesn't really clear things up. And yet I'd like to know more about what, exactly, a "dynamic armature" is if it's not a dynamic driver along the lines of other dynamics, including Sennheiser's IE8.
