The upgrades to sound and ANC come nearly four years after the Momentum 4. Billy Steele for Engadget RATING : 8.5 / 10 Pros Excellent sound quality Long battery life Improved ANC Small but meaningful design tweaks Cons More expensive than the previous model Dolby Atmos is a work in progress Four years is a long time to go between headphone models. While some companies debut new models every year or two, others push their update cycles out farther. Of course, the benefit of extending a product's lifespan is there will likely be more a company can offer by way of significant improvements. If the features are considerably better rather than just iterative, it makes any new set of headphones more compelling to anyone who owns the previous generation. Sennheiser last updated its Momentum Wireless headphones in 2022, and at that time the highlights were a completely new look and 60-hour battery life.…