There, I quoted the entire post because you apparently don't remember what you wrote. That looks to me like you said the K240's don't improve with the E7 versus your iphone, which contradicts your later post saying (without reference to any specific headphone), that a headphone amp improves sound and called me stupid for not knowing that. Seems to me you are a very defensive loser.
The SE-700 uses piezoelectric film drivers, which is a completely novel and thus irrelevant design since it is not at all similar to dynamic headphones like the K240's. If they were near infinite impedance, I doubt an E7 would make them loud enough to even hear.
I really don't see where you get off calling me an idiot.. I actually gave you the answer before anyone else, that the E9 has a higher output impedance and is thus a worse choice than the E7 you already have.
For some reason I highly doubt you even know what output impedance is, or even read any of my posts, or anything about how amplifiers work, and would rather call me stupid because you read some audiophile nonsense online. You are exactly the problem with "audiophiles".
But go ahead, buy an E9; the ultra-audiophile grade capacitors will make the bass energy much faster and dynamic, the extra power will increase the treble range (and also the energy and transients)
Edited by Eisenhower - 11/12/12 at 8:23pm