As I understand it, the better the seal with the dt48, the flatter the frequency response overall....not just the bass region. From maniacal71: " the idea of this is to connect the sound waves directly to the ear canal, this way the FR chart will be true, as they did the coupler pick up." That's how Beyer measured them, and the frequency response was very flat, if I remember the graph correctly.
Quote:
Originally Posted by
EYEdROP 
How do the HD solo pads affect the rest of the sound?