![HiFiMAN HE-500](http://www.headfreqs.com/wp-content/uploads/2013/03/web102-470x140.jpg)
The HiFiMAN HE-500 uses a planar magnetic driver as apposed to the dynamic voice coil drivers found in most headphones. Meaning an array of magnets…
![Grado PS500](http://www.headfreqs.com/wp-content/uploads/2013/03/web096-470x140.jpg)
Grado is known for their open back sound performance and the PS500 is one of their newest in the professional series. The PS500 is the…
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