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Sennheiser CX 150BT vs. CX 350BT Wireless Earphones

Sennheiser has two new wireless earphones on the market with the CX 150BT and CX 350BT. So which of these products will best suit your needs? You can find our comparison, in terms of specs and features, between the two earphones below.

Quick Summary

Although more expensive, the Sennheiser CX 350BT Wireless Earphones does come with the Sennheiser Smart Control App in addition to support for the AptX and AptX Low Latency codecs.

Aside from those extras, however, the more affordable Sennheiser CX 150BT Wireless Earphones have the same exact specs and features. So, if you don’t plan on using the aforementioned additions from the CX 350BT, then you should opt for the lower priced version in the CX 150BT.

You can purchase the two version on Amazon with the following links:

CX 150BT vs. CX 350BT Comparison Chart

 Sennheiser CX 150BTSennheiser CX 350BT
Color Options Black and WhiteBlack and White
What's in the boxCX 150BT wireless earphones

Ear adapter set (XS/S/M/L)

USB-C charging cable

Quick Start Guide

Safety Guide
CX 350BT wireless earphones

Ear adapter set (XS/S/M/L)

USB-C charging cable

Quick Start Guide

Safety Guide
Weight12 grams12 grams
Battery10 h, SBC10 h, SBC
Ear pad material Biocompatible Silicone
Biocompatible Silicone
Ear couplingEar-canal Ear-canal
Bluetooth ConnectionBluetooth 5.0Bluetooth 5.0
Supported Bluetooth ProfilesAdvanced Audio Distribution Profile (A2DP)

Audio/Video Remote Control Profile (AVRCP)

Hands-Free Profile (HFP)

Headset Profile (HSP)
Advanced Audio Distribution Profile (A2DP)

Audio/Video Remote Control Profile (AVRCP)

Hands-Free Profile (HFP)

Headset Profile (HSP)
Frequency response17 - 20,000 Hz (- 10 dB)17 - 20,000 Hz (- 10 dB)
Impedance28 Ohm28 Ohm
Sound Pressure Level (SPL)112 dB (1 kHz/0 dB FS)112 dB (1 kHz/0 dB FS)
Total Harmonic Distortion (THD)0.5% (1 kHz, 100 dB SPL)0.5% (1 kHz, 100 dB SPL)
Transducer PrincipleDynamicDynamic
Codec SupportSBC

AAC
SBC

AAC

AptX

AptX Low Latency
MicrophoneMEMS, omnidirectionalMEMS, omnidirectional
Warranty2-year warranty2-year warranty
Call and music managementAnswer and end calls

Lower and increase the volume

Play and pause tracks

Skip ahead and go back
Answer and end calls

Lower and increase the volume

Play and pause tracks

Skip ahead and go back
Sennheiser Smart Control App Support?NoYes
PricingCheck price on Amazon.Check price on Amazon.

Colors

Both models are available in the same two color variations: Black and White.

What’s included in the package

Aside from the different headphones, the contents included in the packages are the same. The box will come with an ear adapter size set for extra small, small, medium and large sizes. Also included are a Quick Start Guide, Safety Guide as well as USB-C charging cable.

The Sennheiser CX 150BT (Black) on Amazon.

Weight

Both the Sennheiser CX 150BT and CX 350BT are identical in weight, registering at 12 grams.

Battery

The 150BT and 350BT have the same battery life of 10 hours.

Ear pad material and Ear coupling

Both models also use the same ear pad material in biocompatible silicone. Moreover, the two products utilize ear-canal coupling.

Bluetooth Connection

The two earphones uses the same advanced Bluetooth 5.0 to connect seamlessly without a wire to your device. You can even hook up wirelessly to two devices at the same time.

Supported Bluetooth Profiles

The 150BT and 350BT also have matching supported Bluetooth profiles: Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP), Hands-Free Profile (HFP) and Headset Profile (HSP).

Frequency response

The frequency response for both models are the same at 17 – 20,000 Hz (- 10 dB).

Impedance

The CX 150BT and CX 150BT have the same impedance at 28 Ohm.

Sound Pressure Level

The sound pressure level, or SPL, is also the same across the two wireless devices at 112 dB (1 kHz/0 dB FS).

Total Harmonic Distortion

The Sennheiser CX 150BT and Sennheiser CX 350BT Wireless Earphones have identical total harmonic distortion (or THD) at 0.5% (1 kHz, 100 dB SPL).

Transducer Principle

Both models also features dynamic transducer principle.

Codec Support

The two wireless earphones support SBC and AAC codecs. The CX 350BT does have the advantage in this category as it also supports AptX and AptX Low Latency codecs.

Microphone

The two Bluetooth earphones also use the same MEMS, omnidirectional microphone.

The Sennheiser CX 350BT (White) on Amazon.

Call and music management

Both earphones use an in-line remote to control calls and music. You will be able to answer and end calls, play and pause tracks, lower and increase the volume as well as skip ahead and go back to a previous track.

Sennheiser Smart Control App

Exclusive to the CX 350BT Wireless Earphones is the Sennheiser Smart Control App. This application includes a battery status indicator, equalizer, podcast mode with optimized speech, quick guide and firmware updates.

Warranty

Both products feature a 2-year warranty.

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