Sennheiser CX Plus: Quick Specifications

Sennheiser CX Plus True Wireless Overview

The CX Plus True Wireless is positioned as a feature-rich pair of in-ear wireless earbuds focused on sound quality, noise control and everyday convenience.

Its 7mm TrueResponse dynamic transducers are paired with Active Noise Cancellation and Transparent Hearing. This gives users the choice of reducing external noise or deliberately letting environmental sound through when needed.

Bluetooth 5.2 connectivity supports aptX, aptX Adaptive, AAC and SBC, while the Sennheiser Smart Control app provides additional personalization options.

Sound Quality & 7mm TrueResponse Drivers

Sennheiser uses its 7mm TrueResponse dynamic transducer in the CX Plus. The speaker system has a published frequency response of 5Hz to 21kHz.

The closed-back in-ear design also provides physical isolation from the surrounding environment before Active Noise Cancellation is considered.

Adjustable Sound

The Sennheiser Smart Control app provides equalizer controls and sound personalization. Bass Boost can also be used when a stronger low-frequency presentation is preferred.

Active Noise Cancellation

Active Noise Cancellation is one of the CX Plus's main features. It is designed to reduce unwanted environmental noise so users can focus more easily on music, podcasts and calls.

ANC can be particularly useful in environments such as offices, public transport and other continuously noisy surroundings.

Transparent Hearing

Transparent Hearing lets environmental sound pass through the earbuds without requiring the user to remove them.

This can be useful when talking to someone, listening for announcements or maintaining awareness of the surrounding environment.

Bluetooth & High-Quality Codecs

The CX Plus uses Bluetooth 5.2 and supports several audio codecs: SBC, AAC, aptX and aptX Adaptive.

The available codec depends on the connected source device and its operating system and Bluetooth implementation.

Call Quality & Microphones

Each earbud uses a dual-microphone arrangement designed to optimize speech pickup during calls and voice-assistant use.

The microphone system works together with the earbuds' processing to help provide clearer voice communication.

Sennheiser Smart Control App

The Smart Control app is an important part of the CX Plus experience. It provides access to sound personalization, equalizer settings, Bass Boost and customizable touch controls.

Users can configure how different touch interactions control playback, calls and voice-assistant functions.

Smart Pause & Independent Earbud Use

Smart Pause automatically pauses audio when an earbud is removed and resumes playback when it is placed back in the ear.

The CX Plus also supports independent use of the left or right earbud, allowing either side to be used individually.

Battery Life & Charging

Sennheiser rates the CX Plus earbuds for up to 8 hours of music playback. The charging case provides additional battery capacity for a total of up to 24 hours of playback.

Battery performance varies according to volume, codec, ANC usage, device settings and environmental conditions.

Design, Fit & Comfort

The CX Plus uses a traditional in-ear true wireless design with silicone ear adapters. Sennheiser includes four ear-tip sizes: XS, S, M and L.

Choosing the correct ear-tip size is important not only for comfort but also for passive isolation and the effectiveness of Active Noise Cancellation.

IPX4 Splash Resistance

The earbuds carry an IPX4 rating for splash resistance. This makes them suitable for everyday situations where they may encounter sweat or light splashes.

Gaming & Video Experience

Bluetooth 5.2 and aptX Adaptive support can be useful for compatible devices where low-latency or adaptive Bluetooth audio is available.

The actual gaming latency depends on the source device, game, Bluetooth implementation and selected codec. Therefore, the CX Plus should not be treated as a dedicated ultra-low-latency gaming headset.

Sennheiser CX Plus: Pros & Cons

Sennheiser CX Plus True Wireless Full Specifications

Who Should Buy the Sennheiser CX Plus?

Who Should Consider Another Pair?

If you want the newest Bluetooth standards, significantly longer battery life, wireless charging or newer-generation features, a more recent true wireless model may be worth considering.

Final Verdict

The Sennheiser CX Plus True Wireless remains an appealing choice for listeners who prioritize sound quality and codec flexibility. Its 7mm TrueResponse drivers, aptX Adaptive support and customizable EQ give it a strong audio-focused identity.

Active Noise Cancellation and Transparent Hearing make the earbuds versatile for everyday use, while the 8-hour earbud battery and 24-hour total battery provide a practical amount of listening time.

The main consideration is age. Bluetooth 5.2, 24-hour total battery life and the lack of newer-generation conveniences mean newer premium earbuds can offer more modern specifications.

Source & Specification Note

Core specifications in this review are based primarily on Sennheiser's published CX Plus True Wireless specifications, including the 7mm TrueResponse transducer, Bluetooth 5.2, supported codecs, ANC, IPX4 rating, battery capacity and playback specifications.

Battery figures are manufacturer-rated maximums under specified test conditions. Actual playback time varies with volume, codec, ANC use, connected device and other factors.