Question as in the title, Is it safe to do so? Is there any difference if I use the amp?   btw, I've just purchased the E06, sounds great for a beginner like me. Is it ok if I charge using the USB Charger? As in the manual, the current is 500mA for Fiio E06. I think it's faster if I charge...

Hi, I am a beginner here, my 1st (quality) earphone is still on shipping :P I love music and so decide to study more on sound quality. I usually listen to music from my Xperia Arc S. As shown in the review here, my phone doesn't perform well when attached with an headphone. I wonder what is...