Short answer: the Sennheiser CX 3.00, though neither ranks well in its class. It ranks #1058 of 1291 in-ear headphones by sound quality, rated 2.7/5, at $79.99; the Anker Soundcore Liberty 4 NC ranks #1082, rated 2.6/5, at $79.99. With prices this close, go by the sound-quality ranking rather than the cost. Both are rated below 3.0/5 among the 1291 in-ear headphones, and the Intuaura Reference 2019, ranked #7 at $34.99, is a better place to start if sound quality matters.
What the Sennheiser CX 3.00 does well: Bass is boosted about 4 dB at 60 to 200 Hz and 2.5 dB below that in oratory1990’s measurement, so kick drums and bass lines hit with extra weight. The tradeoff: A sharp 8.6 dB peak near 7.6 kHz can make hi-hats and sibilants harsh, and presence between 3 and 6 kHz is down about 4.3 dB, with a 5.7 dB dip near 3.5 kHz that pushes vocals back.
What the Anker Soundcore Liberty 4 NC does well: These true wireless earbuds pack active noise cancelling, LDAC for higher bitrate streaming from Android phones, and IPX4 splash resistance. The catch: A peak of 8.6 dB near 8.7 kHz adds sharpness to cymbals and sibilance, while the upper mids and presence region sit about 2 dB low, so vocals sound recessed behind the bass and treble.
Buy the Sennheiser CX 3.00. It is rated higher for sound quality than the Anker Soundcore Liberty 4 NC at the same price, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Headphones rankings cover every ranked option.
Bass is boosted about 4 dB at 60 to 200 Hz and 2.5 dB below that in oratory1990’s measurement, so kick drums and bass lines hit with extra weight.
Amazon $79.99 eBay
These true wireless earbuds pack active noise cancelling, LDAC for higher bitrate streaming from Android phones, and IPX4 splash resistance.
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Specifications Side By Side
| Sennheiser CX 3.00 | Anker Soundcore Liberty 4 NC | |
|---|---|---|
| Price | $79.99 | $79.99 |
| Ranked | #1058 of 1291 in In-Ear Headphones | #1082 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 58 (measured by oratory1990, via AutoEQ) | 56 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.19 dB standard deviation | 3.15 dB standard deviation |
| Tonal Tilt | -0.74 (negative is warmer, positive brighter) | -0.90 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.8 dB at 30 Hz) |
| Connection | Wired | True wireless |
| Driver Type | Dynamic | - |
| Impedance | 18 ohms | - |
| Sensitivity | 118 dB SPL/V | - |
| Frequency Response | 17Hz - 21kHz (Manufacturer specified) | - |
| Back | Closed | Closed |
| Drivers | - | 1 x 11mm driver |
| Weight | - | 0 lbs (5.2 g) per earbud |
| Active Noise Cancelling | - | Yes |
| Battery Life | - | 10 hours (50 with case, Manufacturer specified) |
| Bluetooth Version | - | 5.3 |
| Bluetooth Codecs | - | SBC, AAC, LDAC |
| Built-in Microphone | - | Yes |
| IP Rating | - | IPX4 |
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