Sennheiser CX Plus
True Wireless Review
The Sennheiser CX Plus True Wireless combines 7mm TrueResponse dynamic drivers with Active Noise Cancellation, Transparent Hearing, aptX Adaptive Bluetooth audio and up to 24 hours of total playback with the charging case.
Sound-focused wireless earbuds with ANC
The CX Plus True Wireless is designed around Sennheiser's TrueResponse sound platform. It uses 7mm dynamic drivers, Active Noise Cancellation and Transparent Hearing, while the Sennheiser Smart Control app provides EQ and control customization. Bluetooth 5.2 supports aptX, aptX Adaptive, AAC and SBC codecs.
Key strengths and considerations
Pros
- ✓ 7mm Sennheiser TrueResponse dynamic drivers.
- ✓ Active Noise Cancellation with Transparent Hearing mode.
- ✓ aptX Adaptive, aptX, AAC and SBC codec support.
- ✓ Up to 8 hours of playback from the earbuds and up to 24 hours with the charging case.
- ✓ Sennheiser Smart Control app supports EQ, Bass Boost and control customization.
- ✓ IPX4 splash resistance for the earbuds.
Things to consider
- • The CX Plus is an older-generation Sennheiser model and is listed as End of Life on Sennheiser's current US product page.
- • The stated 8-hour battery figure is based on specified test conditions and can vary with volume, codec and features.
- • IPX4 is splash resistance, not protection against immersion.
- • Wireless charging is not listed in the supplied specifications; the case charges through USB-C.
Sennheiser CX Plus at a glance
| Category | Specification |
|---|---|
| Product type | True Wireless Stereo earbuds |
| Driver | 7mm dynamic TrueResponse |
| Driver design | Dynamic, closed-back |
| Frequency response | 5Hz – 21kHz |
| Sound pressure level | 114dB at 1kHz / 0dBFS |
| THD | <0.08% at 1kHz, 94dB SPL |
| Noise cancellation | Active Noise Cancellation |
| Transparency | Transparent Hearing |
| Bluetooth | Bluetooth 5.2 |
| Audio codecs | aptX, aptX Adaptive, AAC, SBC |
| Bluetooth profiles | HFP, AVRCP, A2DP |
| Microphones | 2-microphone beamforming array per earbud |
| Earbud battery | 55mAh each |
| Charging case | 400–420mAh |
| Playback | Up to 8 hours earbuds; up to 24 hours with case |
| Charging | USB-C |
| Charging time | Approximately 1.5 hours |
| Quick charge | 10 minutes provides approximately 1 hour playback |
| Water resistance | IPX4 splash resistance |
| Earbud weight | Approximately 6g each |
| Total weight | Approximately 47g including case |
TrueResponse sound with customizable tuning
The CX Plus uses Sennheiser's 7mm TrueResponse dynamic transducers. The Smart Control app allows users to customize the listening experience with equalizer controls and Bass Boost. The earbuds also support aptX Adaptive alongside aptX, AAC and SBC.
7mm TrueResponse
Sennheiser's dynamic TrueResponse transducer is designed for the CX Plus sound signature.
aptX Adaptive
Compatible devices can use aptX Adaptive for supported Bluetooth audio transmission.
Smart Control
The Sennheiser app provides EQ presets, Bass Boost, ANC and touch-control customization.
ANC plus Transparent Hearing
Active Noise Cancellation is designed to reduce surrounding noise, while Transparent Hearing lets ambient sound through when awareness of the surroundings is needed. Sennheiser's manual notes that continuous low-frequency sounds such as motor or fan noise are particularly well suppressed, while speech and higher-frequency sounds can remain perceptible.
Up to 24 hours with the charging case
Sennheiser rates the earbuds for up to 8 hours of playback, with the charging case extending total playback to up to 24 hours. The company specifies approximately 1.5 hours for a full charge and says a 10-minute charge can provide about 1 hour of music playback.
Who should consider it?
Music listeners
A good fit for listeners who want Sennheiser's sound platform, customizable EQ and support for higher-quality Bluetooth codecs.
Commuters
ANC and the in-ear design are useful for reducing surrounding noise during travel and everyday commuting.
Everyday users
The 8-hour earbud battery rating and 24-hour total rating provide a straightforward daily listening setup.
Our take
Sound and feature focused
The CX Plus combines Sennheiser's 7mm TrueResponse drivers, ANC, Transparent Hearing, app-based tuning and aptX Adaptive support in a compact true-wireless design.
Bottom line
The Sennheiser CX Plus True Wireless remains a feature-rich option for listeners interested in Sennheiser's sound tuning, ANC and aptX Adaptive support. Since this is an older model, check the current Amazon price, seller, warranty and product condition carefully before purchasing.
Sennheiser CX Plus questions answered
Interested in the Sennheiser CX Plus?
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🛒 Check Latest Amazon PriceProduct specifications are based on Sennheiser's published CX Plus True Wireless documentation and product information. Battery life, codec availability and other performance characteristics can vary with device, settings, codec, volume and usage conditions.