Kind Sennheiser offers cash refund when trading in old headphones for new


Sennheiser has cottoned onto the HD DVD cash-back trade-in program offered in several US (and Swiss) retailers, and is now offering up to $25 in hard cold cash when you trade in your ear-wax coated old ones.

When trading in any pair of earbuds or headphones, a $5 refund is offered when you purchase entry-level earbuds, $10 on sport earbuds, $15 for in-ears, and $25 for noise-cancelling models. All you need to do reportedly…