It’s fair to say this isn’t what I expected. Sennheiser’s new Momentum 4 Wireless headphones mark a dramatic pivot away from the retro stylings of previous models. The genuine leather headband and stainless steel ear cup sliders that came to represent the Momentum line are now history. Instead, the $349.95 fourth-generation headphones take an unmistakable design turn into Sony and Bose territory, with a lightweight build that puts greater emphasis on extended comfort.
Additionally,…