Sennheiser ACCENTUM Plus Wireless (Black) review

ACCENTUM Plus Wireless is the ACCENTUM option with the clearest documented cable flexibility: Bluetooth, USB-C digital audio and 2.5 mm analog input are all described in its manual. The included analog lead can be used when the battery is empty, while active noise cancellation over that cable requires a charged headphone. It shares the family's up-to-50-hour Bluetooth ANC-on rating, but its added controls and connections—not a proven improvement in attenuation—are the meaningful reasons to choose it. This is a source-based assessment of Black U.S. SKU 700176, not a product test.

Separate the Plus from neighboring models

Sennheiser lists Black ACCENTUM Plus Wireless as item 700176 and White as 700177. A separate certified-refurbished page identifies Black B700176 and White B700177. Its listing describes inspection and a one-year manufacturer warranty; confirm the condition, box contents and current terms for the exact offer. The product photograph identifies the headset finish but not whether an individual unit is refurbished.

Compared with standard ACCENTUM Wireless, the Plus manual adds an analog cable input and USB-C audio streaming, while the manufacturer's product description highlights adaptive hybrid ANC, touch controls, Smart Pause and Sound Personalization. The manual and product page also list a carry case and auxiliary cable. These are documented equipment and interaction differences. They do not establish that Plus cancels more noise in a controlled comparison, or that its sound is objectively superior.

Three connection paths, three power situations

Bluetooth is the simple everyday route. The manual says the headphones reconnect to their last two connected Bluetooth devices, save up to six pairing profiles and play audio from one device at a time. This supports two-device switching, not simultaneous mixing. The current specification lists Bluetooth 5.2, SBC, AAC, aptX and aptX Adaptive. It rates Bluetooth music with ANC up to 50 hours, using an iPhone at medium volume as the named test condition. Sennheiser lists about 3.5 hours for a full charge and says a ten-minute charge may provide up to five hours of playback. Actual endurance depends on the usage and environment; the maximum is not an itinerary guarantee.

For analog listening, the included cable has a 2.5 mm plug at the headphone and a 3.5 mm plug at the source. Connecting it activates flight mode and turns Bluetooth off. The manual specifically lists the cable as useful when the rechargeable battery is empty, so the documentation supports a battery-depleted wired fallback. ANC is a separate powered function: Sennheiser says it can be fully used only if the battery is charged. In other words, a flat-battery cable session and ANC over cable are not one arrangement. Keep those needs separate when comparing models.

The USB-C socket also streams audio from a compatible PC, Mac or mobile device through the supplied cable, and the manual says the headphones charge over that connection. This is digital USB audio, not a 3.5 mm adapter, and it does not make the Bluetooth runtime rating a wired-runtime promise. For an unfamiliar device, verify that it supports USB audio output and that its settings select ACCENTUM Plus.

Smart controls and a meaningful specification conflict

The Plus uses a right-earcup touch pad, supports automatic pause when removed, and works with Sennheiser's app features including a five-band EQ and sound personalization. Those features can help shape day-to-day interaction, but they introduce app and gesture setup to consider; the manual says touch can be deactivated. For a buyer who prefers physical-button operation, this deserves attention before choosing the Plus over the standard model.

One specification should remain unresolved: the ACCENTUM Plus manual lists a built-in 700 mAh battery, while the current official support specification lists 800 mAh. Both are manufacturer sources for this model, and the captured product information does not reconcile the difference. This review therefore does not select a capacity. The shared 50-hour rating and the approximately 3.5-hour charge figure are separate supported specifications, not deductions from battery capacity.

What to check before purchase

Confirm the exact Black 700176 or White 700177 listing, and whether it is new or certified refurbished. For passive listening, verify that the 2.5-to-3.5 mm cable is in the specific package and that your source has a compatible output. If you need ANC while wired, plan to keep the headphone charged; the manual's battery-empty cable route does not provide active cancellation. For USB audio, check host compatibility. If two devices must remain connected, remember that only one source plays at a time. And if the app-driven touch controls are not your preference, compare its operation with the standard ACCENTUM Wireless before deciding.

Primary references: the U.S. ACCENTUM Plus listing, current specifications, and instruction manual. The capacity conflict is left visible rather than resolved by guesswork; fit and noise cancellation are not represented as personally tested.