Pros: Line-Out signal that bypasses the iPod's internal amp, no wires to fray, light, adds mini USB port to iPod for charging, small
Cons: Dock connector type that doesn't clip to your iPod, have to be careful not to lose it.
Previously, I owned FiiO's L1, their cheapest LOD. It worked very well, and was perfect for plugging into an external amp. My iPod's headphone jack has shorting and distortion problems, this gave me a secondary output AND bypasses the somewhat bright internal amp of the iPod. I would plug the LOD into a FiiO E5, and that into a cassette adapter for my car stereo. The signal became much stronger, sound quality is clearer than and more articulate than before... It sounded like I replaced the speaker drivers, and better than the FM radio. Unfortunately, I got line-out greedy, used the L1 portably while my iPod was in a pants pocket, and the L1's cable split and frayed quickly at the dock...
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