We know each other so well as a team, the quiet ones were left to their own devices on the coach on the way to the Millennium Stadium, while us louder ones were lapping it all up.
To explore this, I switched to using Beyerdynamic DT 990 Pro over-ears with a high impedance of 250 ohms and found that the difference was obvious: the iPhone 4 and 4S were the only devices to provide sufficient volume in quiet recordings using these headphones.
The cool-running, lower-power Barracuda Green hard drive delivers whisper-quiet acoustics and helps reduce system costs associated with the fans and power supply devices often required for power-hungry systems.