KING DRANZER
100+ Head-Fier
7506 is better than 7510 in a way. Don't know why SONY even produced that specific cans but it was a waste. See they are not much better than 7506 and has nothing significant to offer and are comparatively dull with no noticeable(very little if any) improvement in clarity but are priced almost double.Is it an improvement over 7510? I have them. they are really "dark" or "grey" hard to describe. Soundstage seems a bit narrow. Never tired the 7506. I use headphones mostly for sound production (writting a whole track on it, mixing etc)
I also have the akg 371 but these make me hear my own heartbeat for some reason. I think I cannot use these squishy foam pads because they create this effect on me. The membrane type pads of these sonys make it less noticeable. What I really like about these is the short cable option tho. Because the cable on Sonys is so annoying.
7520 are on a completely different level. Very high on detail, clarity, precision and being flat out neutral. The quality of the bass, it may not hit continuously with the quantity but where it matters it packs real punch and brings up the quality without losing any detail. Many think that there are harsh but that is not the case at all. The 7520 has very smooth treble roll off without having sudden peak or drop in that region which gives best detail retrieval at high end. But they are unforgiving. The midrange is spot on it is not recessed or forward it is detailed I know some people like to have a little bump in lower mids to get more detail but 7520 offers that detail and clarity with accuracy without having that bump. Perfect imaging it is simply perfect. But most interesting part is that it has wide and deep sound-stage of any decent closed back headphones, I was surprised with that have you had experience with HD660S or HD650 this is as good as them in sound-stage( I know HD660S and HD650 are not very good on sound-stage for open-backs but they are better than closed-backs and here I am comparing a closed back 7520 to them).
You can swap out the cable on 7520. But I use stock pads only and I already ordered three pair of stock ear-pads and stored them. For me the audio quality coming from paired stock pads is worthy over having comfy ear pads and ruining the sound signature. Sadly 7520 has been discontinued. Bad move on SONY's part.
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