Multiple owners report hardware failures including Bluetooth dropout, non-functional buttons, creaking headband, and complete unit failure within weeks to months of use.

“As with all reviews of the Momentum 4 headphones mine stopped working — Bluetooth drops out and won't reconnect. I was unable to pair them with any other device as the button no longer worked.”

vs Marketing: Marketing promotes a 'lightweight, foldable design' built for travel and all-day use, with no acknowledgment of failure rates; all 3 durability reporters are verified owners experiencing real hardware breakdowns.

Independent reviewers consistently rate the ANC as middling and not competitive with Bose or Sony, directly contradicting marketing language of 'elite noise-cancelling technology.'

“Middling ANC... If you're looking for a slightly more affordable set of ANC headphones in comparison to the Bose or Sony offerings: the Sennheiser MOMENTUM 4 Wireless is not a bad way to go. While its ANC is [not class-leading].”

vs Marketing: Sennheiser markets 'elite noise-cancelling technology that puts a kibosh on nearly every sound it encounters across the frequency spectrum, especially wind' — reviewers explicitly label it 'middling' and inferior to top competitors.

While most users confirm strong battery life in the 50–60 hour range, at least one owner reports only 15 hours of real-world use, indicating significant variance from the marketed 60-hour claim.

“The battery life for me last about 15 hours... [another user in the same thread:] the battery life is phenomenal, 50 or 55 hours.”

vs Marketing: Marketing repeatedly claims 'up to 60 hours with ANC' across 6+ distinct marketing statements; one verified owner reports 15 hours — a 75% shortfall — though the majority of the 4 battery reporters confirm impressive longevity.

Verified owner reports audible plastic clicking inside both earcups when turning their head after just 2 days of use.

“I bought Momentum 4 and used it for 2 days. I noticed that when I turn my head around, I can hear a plastic click inside the earcups, both left and right.”

vs Marketing: Marketing describes 'elegantly streamlined style' and premium construction; early-onset mechanical noise from the earcup internals contradicts the premium build positioning.

A minority of users report discomfort after extended wear (one hour), and the headband cushioning is flagged as an area needing improvement by satisfied owners.

“I like the new Momentum 4 Wireless... If the headband gimbals and the ear pads could be improved, it would be perfect.”

vs Marketing: Marketing claims 'deeply cushioned ear pads for long-lasting comfort' and 'incredible wearing comfort'; while most users are satisfied, a subset experiences discomfort after one hour and headband padding is a recurring improvement request.