chglp 0 Report post Posted October 2, 2011 Hi, Anyone can advise what is the different between Sony MDR 7506 vs Sennheiser HD 500A? Recently bought the Sony MDR 7506 headphone but my son sound therepist feedback not suitable because of frequency response and impedance is not match. And Sony is not an open system. Appreciate your advise Share this post Link to post Share on other sites
alamakazam 0 Report post Posted October 2, 2011 sound therepist? guess this is not for pleasure explain your usage Share this post Link to post Share on other sites
Stereo_Electronics 0 Report post Posted October 6, 2011 Not an open system as in not open can? Need more details about this sound therapy and care to share what will be you be using these pair of headphones for? Share this post Link to post Share on other sites
