The ACCENTUM Open takes the silicone tip and the fit test out of the setup. The shell rests at the entrance to the ear, so someone at the next desk can speak to you without waiting for a transparency mode. There is also no smaller or larger tip to rescue a poor fit.
In depth
Sennheiser ACCENTUM Open review
Published
Best forPeople who listen to podcasts while keeping an ear on a shared room.
At a glance
- Noise cancellation
- Not supported
- Weight
- 4.4 g per earbud
- Battery life
- Up to 6 h (no ANC hardware)
- Connections
- Bluetooth 5.3 multipointUSB-C charging
Pros
- Low 4.4 g weight and open fit keep the ear canal clear.
- Multipoint lets a phone and laptop stay connected.
Cons
- The fixed shell offers little fit adjustment.
- Sound adjustments depend on the playback device.
Sound & Fit
- 11 mm dynamic driver
- Open acoustic design
Headphonecheck heard a solid low end for an open earbud and found the top end restrained, bringing voices forward. That balance suits spoken programs in a quiet room. There’s no companion-app EQ to change it, although an equalizer in the source device or player may help. 1
Connectivity & Calls
- Bluetooth 5.3
- Two-device multipoint
Keep a phone and computer connected together. A work call can take over without unpairing your music source, and the open earpiece lets you hear your own voice naturally while speaking. The microphones process your outgoing voice; that is separate from blocking room sound for the listener.
Battery & Charging
- Up to 6 hours per charge at 85 dB
- USB-C case
For a long train ride, plan on the six hours Sennheiser lists in its US support specifications. It rates the buds for up to 24 hours including the case, using an iPhone at 85 dB, and quotes an hour of music after a ten-minute charge.
The instruction manual gives a more generous estimate with a phone within a meter, AAC and 50% volume. It lists 6.5 hours per charge, 28 hours including the case and 90 minutes after a ten-minute top-up. The shorter current estimate leaves more room for a delayed trip.
Alternatives
Soundcore’s Liberty Buds adds stabilizing fins, adjustable EQ and active cancellation to a semi-open design. Choose that approach if a smooth shell tends to move when you talk. If you already own open earbuds that fit and just want better isolation, a sealed design changes that experience far more directly.
Verdict
The ACCENTUM Open is a good fit for conversations between listening sessions, especially at a desk shared by a phone and laptop. Give the fixed shell a proper try before relying on it for exercise or a long commute.
About this review
This is a research-based review. The Fasit has not physically tested this product.
Sources & Research
1 reference
Independent sources cited in this article.
- HeadphonecheckSennheiser Accentum Open review (opens in a new tab)https://www.headphonecheck.com/test/sennheiser-accentum-open/
Reviewer’s listening impression of midrange and treble, no companion app tuning and fit variability.