The built-in USB-C dongle/DAC assembly is praised as powerful and removes the need for a separate external adapter. It is part of what makes the wired setup compact and self-contained.
Pros: Sound quality, Eartips fit
Cons: Overall satisfaction, Bass performance
Optional or promotional Sennheiser dongles are seen as useful for unlocking aptX on sources that lack native support. Their value is greatest for listeners who specifically want the higher-quality codec...
Pros: User-replaceable batteries, Overall satisfaction
Cons: Auracast support, Sensors
The USB adapter generally provides reliable, low-friction PC connectivity and may improve call performance in some setups. One configuration may still require an extra USB adapter.
Pros: Battery, Charging
Cons: Value for money, Codec support
The M2 transmitter and dongle system were central to the praise, with reviewers repeatedly calling the low-latency mode useful, fast and close to wired, despite one stutter complaint.
Pros: Overall recommendation, Comfort during long use
Cons: Sound quality, Frequency response accuracy
The dongle experience was strong, with plug-and-play setup, stable connections, and no reported latency through Lightspeed in tested use.
Pros: Comfort during long use, Design and Aesthetics
Cons: Build quality, Microphone
The dongle was mostly praised for easy docking, reduced clutter, side-kicked USB-C shape, and multi-platform expandability, despite manual swapping complaints.
Pros: Sound quality, Included stand quality
Cons: Detachable microphone convenience
The 2.4GHz USB-C dongle is central to the appeal, delivering excellent low-latency gaming and useful passthrough charging. A few units show disconnects or awkward port blocking, so reliability is not...
Pros: Overall satisfaction, Sound quality
Cons: Value for money, Bass performance
The optional Smart TX transmitter can add wireless audio to planes, old TVs, and other non-Bluetooth sources. It is potentially useful, though its extra cost is substantial.
Pros: Overall recommendation, Active noise cancellation
Cons: Bass performance, Clamping force comfort
The included second transmitter is a major convenience for switching between separated systems without moving cables. Expansion units cost extra and have sometimes been unavailable, defective, or unrecognized by Swarm...
Pros: Overall satisfaction, Sound quality
Cons: Weight comfort, Stability
The included USB-C adapter improves compatibility and often raises volume, but results vary by device and some users report limited power or inconsistent Windows behavior.
Pros: Overall satisfaction, Sound quality
Cons: Microphone, Headband adjustability
The USB audio box was useful for saving settings, but one reviewer found it added little practical improvement on console.
Pros: Sound quality, Microphone
Cons: Microphone noise reduction, Spatial audio
PC-focused buyers may miss a dedicated dongle. One reviewer wanted a UC dongle for easier computer integration, even though multipoint helped soften the complaint.
Pros: Sound quality, Microphone quality for calls
Cons: Battery, Bluetooth
The dongle was polarizing: some liked its compact USB-C design, while others found it distracting, unhelpful on console, large, or faulty.
Pros: Sound quality, Value for money
Cons: Button control usability, Dongle
The USB-C dongle delivers responsive low-latency wireless audio, but source priority, mode switching, and occasional connection quirks can make it less seamless than expected. Some users also find its range...
Pros: Overall satisfaction, Sound quality
Cons: Weight comfort, Comfort during long use