Amazon is providing Gift vouchers of varying amounts on the purchase of select Sennheiser headphones on EMI. The GC value will depend on the headphone and the tenure of the EMI selected.
This is a reasonably good deal fro those who are looking to purchase headphones during these days. specifically between January 21, 2016 to January 31, 2016.
For full details, please see
http://g-ec2.images-amazon.com/images/G/31/img16/Audio/Art1/Sennheiser_GC_Program_Website_TnCs._V298997135_.pdf