Ok after burning in my GR07's I have now had a chance to test then on a few different sources in various locations. To begin with I think that after the burn in stage they don't sound as harsh on my ears, this maybe be due to a few other reasons though.
Firstly when using my iphone 4 I now only put the sound to half way (50% volume), at this volume rarely do I get and harsh treble and can listen quit comfortably. However if I turn that volume up one more click (56% volume) that when I start the hear the highs change and sibilance begins to kick in, one more click (62.5% volume) and some snare can become painful to listen too. The 50% volume is fine when I am at work or at home. The only issue I have is when I am on the bus, or walking outside (if there is background noise) I can barely hear any bass and the background noise is too over powering meaning that I have to turn the headphones up, which then results in harsh treble.
However when I listen to them on my computer, the headphones sound amazing (well compared to the iphone). The highs and mids are so much clearer, and the sub-bass is so much more noticeable. It's not till I listen to my iphone that I realize how much of the sub-bass is missing. I can turn the volume up louder and the treble spikes are basically gone.
So when playing the GR07s on a good sound card, they are almost the perfect headphones for me. I think that If I had the same sound quality out of my iohone I wouldn't have a problem with them when on the bus or outside.
So if I was to get an amp would this help with increasing the sub-bass and sound quality when playing them on my iphone? Or is will that just basically increase the volume and remain the same sound quality?
