Sennheiser CX 300-II Precision

Non-Noise-Canceling Headphones / Non-Noise-Canceling Wired Earbuds

Portable isolating ear-insert earphones that come with three sets of ear pieces and a storage case.

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CR Expert Take

How did it perform in our owner surveys and expert lab testing?

Overall Score

The Overall Score for this model incorporates our expert lab test results, as well as ratings for that brand’s reliability and owner satisfaction from our annual product owner survey of members.

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Current Range of Tested Non-Noise-Canceling Headphones

What goes into the Overall Score?

OWNER SURVEYS

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Sound quality

/ 5

Color

/ 5

Type

/ 5

Design

/ 5

Sports model

/ 5

Sensitivity

/ 5

Detailed Test Results

Design and features:This portable ear-insert model doesn't have active noise reduction, but its earplug-like design helps to reduce both outside noise and sound leaking out into your environment. The earphones have high sensitivity, so they can provide satisfying volume levels when used with home audio equipment and even lower-powered portable audio devices. This model comes with three sets of earpieces of various sizes and a storage case.

Sound quality: We found the CX 300-II delivers very good overall sound with a slightly warm character and good dynamics. Bass was well-defined, though low bass frequencies were rolled off and impact was just OK. Midrange had good detail, but was slightly closed-in. Treble was also detailed, but the upper-most frequencies were rolled off.

Comfort: We found that these earphones produce a sense of pressure in the ear opening that might be uncomfortable for some, though the inserts fit well and stay in place with no problems.

About

The Sennheiser CX 300-II portable isolating ear-insert earphones sit inside the ear opening. These earphones have a 47-inch audio cord with a stereo mini-plug. The CX 300-II comes with three sets of ear pieces of various sizes, a storage case, and is covered by a 24-month warranty.

Brand Reliability & Satisfaction

#? in Reliability of all Non-Noise-Canceling Headphone Brands

Did the brand perform consistently well over time?

PREDICTED RELIABILITY SCORE

/ 100

Predicted brand reliability scores are based on the likelihood of newly purchased non-noise-canceling headphones experiencing a problem, adjusted for extended warranty or service contract status and product usage, by the end of the 2nd year of ownership. Higher scores mean better reliability. Ranked #? of 34

Would our members recommend this brand?

OWNER SATISFACTION SCORE

/ 100

Brand owner satisfaction scores are based on how likely owners are to recommend their non-noise-canceling headphone to their friends and family. Ranked #? of 34

Source: Consumer Reports' 2022 and 2024 Summer Surveys

Features & Specs

Features

IP rating

IP comment

Integrated microphone

Call connect, disconnect control

Integrated volume control

Integrated function control

Warranty: parts, labor (mos.)

24/24

Additional features

None

Included accessories

Large, medium, and small ear pieces, storage case

Specs

Weight (oz.)

0.4

Cord length (in.)

Connections

Plug type

Mini (1/8")

Google fast pair

Price & Shop

Sennheiser CX 300-II Precision

CR Expert Take

Overall Score

What goes into the Overall Score?

Detailed Test Results

About

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