A co-worker mentioned while we were talking about audio equipment that the high and low frequencies have different rates of travel. Basically even in a perfect sound proofed room the sound waves from high frequencies would reach the listener earlier than the low frequencies. Enough to notice a difference. He said they was a "sound enhancer" device or circuit that fixes this. I've never heard of this and most of it didnt make sense to me. If this is true than basically I've been hearing music wrong all my life and everyone else for that matter. Anyone heard of this?