Originally Posted by Eisenhower
Actually an amplifier, as should obvious in the name, is designed to AMPLIFY, which means it takes the original signal and increases the voltage, making it louder. It will not make your music sound faster, more energetic, or have more "bass energy".
You're just so wrong it's not funny. Even if you have both at a setting that equates to the same volume, the E9 is going to sound better than the E7 because of better design and better components. Depending on the amp, it increases both voltage AND current in varying amounts. High impedance headphones need high voltage and low sensitivity headphones need high current. Obviously if a headphone is both high impedance and low sensitivity, it needs both high voltage and high current to sound right.
And yes, it CAN make your music sound more energetic. The more power the amp has, the more control it will have over the diaphragm, which can increase attack/decay. Which leads to PRaT (Pace, Rhythm and Timing), which is a headphone's "sense of rhythm". Having lots of PRaT on the low end of the frequency spectrum is commonly referred to as "bass energy". Having lots of PRaT on the whole sound is often called "energetic". If a headphone is underpowered it can most definitely sound slow.
Another example: my Pioneer SE-700s (an absolute BEAST to drive, stupidly low sensitivity and technically infinite impedance) sound like absolute **** out of my iPhone. The midrange is bloomy and grainy, they have no treble extension, and thee PRaT is totally absent. I get enough volume but they don't sound good at all. With the E7, they still sound bad, don't get any louder, but do still sound far better than the iPhone, with a little bit of PRaT and a mostly smooth sound. Only hooking them up to speaker taps can make them sound how they're supposed to. Even at the same volume my E7 commands, they sound FAR better. The highs extend much farther, as do the lows, and everything tightens up and sounds extremely lively.
I don't get how I'm the only one calling you a jackass for this. Try an HD800 out of a Sansa clip and compare it to a DNA Sonett at the same volume. I guarantee you'll change your argument.