Sennheiser CX 400BT vs. Sennheiser CX Plus

Headphones Comparison, Reviews and Tests

Detailed comparison and review of Sennheiser CX 400BT and Sennheiser CX Plus. With our comprehensive overview, you can simply compare design, sound quality, but also other key features of both headphones and easily decide which ones are the right choice for you. Our goal is to help you identify the main differences between products and find the headphones that best fit your needs and expectations.

Headphones Specifications Comparison

Sennheiser CX 400BT vs. Sennheiser CX Plus Comparison Chart
DESIGN AND DIMENSIONS Sennheiser CX 400BT Sennheiser CX Plus
Product Type True wireless earphones - Bluetooth - wireless True wireless earphones - Bluetooth - wireless
Dimensions & Weight Details Earbud: 6 g
Charging case: 37 g
Earbud: 5.9 cm x 3.38 cm x 4.23 cm / 6 g
Charging case: 35 g
Colour White | Black White | Black
Protection - Splashproof, IPX4
Recommended Use Portable electronics Portable electronics
SOUND QUALITY Sennheiser CX 400BT Sennheiser CX Plus
Headphones Form Factor In-ear In-ear
Headphones Technology Dynamic Dynamic
Connectivity Technology Wireless Wireless
Wireless Technology Bluetooth Bluetooth
Bluetooth Version Bluetooth 5.1 Bluetooth 5.2 Sennheiser CX Plus have a more advanced version of Bluetooth than Sennheiser CX 400BT.
Bluetooth Profiles Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) Hands-Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP)
Bluetooth Audio Codec SBC, AAC, aptX SBC, AAC, aptX, aptX Adaptive
Active Noise Cancelling - Yes Sennheiser CX Plus are equipped with active noice cancellation.
Sound Output Mode Stereo Stereo
Sound Effects - Bass Boost
Frequency Response 5 - 21000 Hz 5 - 21000 Hz Both headphones offer the same frequency response.
Total Harmonic Distortion (THD) 0.08% -
Max Sound Pressure 107 dB -
Diaphragm 7 mm 7 mm Both headphones are designed with same thick diaphragm.
Simultaneously Connectable Devices Qty (Multipoint) - 1
Features - TrueResponse technology
MICROPHONE Sennheiser CX 400BT Sennheiser CX Plus
Form Factor Built-in Built-in
Frequency Response - 100 - 10000 Hz
Microphones Included - 4
REMOTE CONTROL Sennheiser CX 400BT Sennheiser CX Plus
Controls Volume control, answer/end, play/pause, next/previous track, reject call, pair mode, voice assistant, equaliser preset -
CABLE Sennheiser CX 400BT Sennheiser CX Plus
Cable Type USB-C to USB-A cable - detachable - straight - 25 cm USB-C charge cable - detachable
FEATURES Sennheiser CX 400BT Sennheiser CX Plus
Features Voice alerts, touch control Touch control
Internet of Things (IoT) Compatible - Yes
Intelligent Assistant Siri, Google Assistant Siri, Google Assistant
BATTERY AND CHARGING Sennheiser CX 400BT Sennheiser CX Plus
Battery Type Headphone battery rechargeable - Lithium Ion Headphone battery rechargeable - Lithium Ion
Battery Capacity 55 mAh 55 mAh Both headphones are designed with the same battery capacity.
Battery Life 7 hour(s) -
Battery Life Details Continuous playback (50% volume): up to 7 hours
Continuous playback (with included charging case): up to 20 hours
Continuous playback (with included charging case): up to 24 hours
Charging Time 1.5 hour(s) 1.5 hour(s) The charging of both headphones last the same time.
Included Qty 2 2
WIRELESS LINK Sennheiser CX 400BT Sennheiser CX Plus
Radio Transmitter Power 10 mW -
OTHERS Sennheiser CX 400BT Sennheiser CX Plus
Included Accessories 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh) 4 pairs of earpads (extra small, small, medium, large), charging case (420 mAh)
Compliant Standards Bluetooth Class 1, Directive 2006/66/EC, WEEE 2012/19/EU, Directive 2013/56/EU -
Service & Support - Limited warranty - 2 years
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