Sennheiser, one of the leading audio brands on the planet, have announced a new initiative in the form of their Trade In, Trade Up promotion, which allows buyers to trade in old wireless equipment from any brand in exchange for a credit of up to $200 toward the purchase of a new Sennheiser wireless system. It’s a canny move designed to shift brand loyalties, with the idea being that, once you try Sennheiser, you won’t go back to your old brand. With up to $200 in savings, it’s not a bad idea to put that implicit claim to the test. Head to sennheiser.com/promos for full details.