Like some other such devices, including Upbeat Audio’s Boosteroo Revolution, the pitch here is that you plug this in to the headphone port of your iPod, then turn your iPod down to a lower volume level, and use the external amp to boost the audio signal, resulting in lower iPod battery consumption and a higher maximum signal output to connected headphones. While this adds the inconvenience of dual battery charging and will be of little to no…
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