True but I find my iPhone's normal output jack to be a bit less bright than the LO/Amp. Also, I noticed and I get better fullness in sound at around the same volume level via the LO/Amp. It's my dedicated music device/backup phone. My primary phoned are Galaxy S2X and BB9900.
I ordered the AKG pads also. The pads on these are good but a tad stiff.