Quote:
Originally Posted by 3602
So I believe we all know about the HeadRoom graphs. I would like to know how to read them. Mostly the distortion and the two sq. wave graphs. The "how" section contains few infomation in this regard. Thanks.

Understanding the graphs are a bit complicated, but they are more than they seem. I will do my best to explain the to my person understanding.
The distortion graph shows the difference between the input and the output. You can see big spikes at the harmonics. A harmonic is where the physical size of the driver creates a frequency at which vibrations is effectively "easier" to reproduce. This is like the same as when you put a sub woofer in a small enclosed space and certain frequencies are very loud and boomy.
The square wave graphs show the response to square waves. The input to the headphones is a square wave. This is a wave that stays up for a certain amount of time, then goes to zero for a certain amount of time. It has 2 states. The headphone however, will not be able to reach the state as fast as the signal itself, so it oscillates until it reaches the state. I would assume that the faster it reaches a flat state, the better. This means that the headphone would not introduce more frequencies than it needs to.
The other square wave graph is merely a faster square wave. This wave will be harder to reach its steady state than the slow one, because it is a much faster wave.