Design and Comfort Comparison
The key difference lies in design: the 770NC features over-ear cups that completely encompass your ears, while the 670NC sits on top of your ears. This fundamental difference affects comfort during extended listening sessions, with the 770NC distributing weight more evenly around your ears rather than pressing directly on them. The over-ear design also creates a better seal for improved noise isolation and bass response.
Sound Quality and Noise Cancellation
Both headphones feature JBL's Pure Bass sound and active noise cancelling technology, but the 770NC's over-ear design provides superior passive noise isolation even when ANC is off. The larger ear cups allow for bigger drivers, potentially delivering richer, more detailed sound with better soundstage. The 670NC still offers solid audio performance but with less natural noise isolation due to its on-ear design.
Battery Life and Features
Both models offer impressive battery life with up to 70 hours of playback with ANC off and around 44 hours with ANC on. They share identical wireless connectivity features, including multipoint connection for pairing with two devices simultaneously. Voice assistant integration and quick charging capabilities are present in both models, making the choice primarily about physical design preferences.
