Short answer: the Sennheiser MOMENTUM True Wireless 4. It ranks #379 of 467 in-ear headphones by sound quality, rated 3.3/5, at $249.95. The Sennheiser CX Plus True Wireless ranks #444, rated 2.1/5, at $179.95, $70 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Sennheiser CX Plus True Wireless: Supports aptX and aptX Adaptive along with AAC and SBC, so it streams well from Qualcomm based Android phones. The catch: An 11.4 dB treble peak near 10.2 kHz makes cymbals and sibilance sharp and fatiguing, while a 6.6 dB shortfall from 3 to 6 kHz hollows out vocals.
The Sennheiser MOMENTUM True Wireless 4 is the better-sounding choice. This true wireless set adds active noise cancelling, Bluetooth 5.4 and a codec list that runs from SBC and AAC up to aptX Lossless and LC3. The catch: Presence from 3 to 6 kHz is about 6.9 dB under target, with an 8.2 dB dip near 5.7 kHz, so voices and guitars sound recessed.
Buy the Sennheiser MOMENTUM True Wireless 4. It is rated higher for sound quality, and the $70 saving on the Sennheiser CX Plus True Wireless is not enough to make up the difference.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| Sennheiser CX Plus True Wireless | Sennheiser MOMENTUM True Wireless 4 | |
|---|---|---|
| Price | $179.95 | $249.95 |
| Ranked | #444 of 467 in In-Ear Headphones | #379 of 467 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 51 (median of 1 squig.link measurements, calibrated to AutoEQ) | 65 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 3.86 dB standard deviation | 2.63 dB standard deviation |
| Tonal Tilt | -0.76 (negative is warmer, positive brighter) | -0.74 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Connection | True wireless | True wireless |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 7mm dynamic | 1 x 7mm dynamic |
| Weight | 0 lbs (6 g) per earbud | 0 lbs (6.2 g) per earbud |
| Frequency Response | 5Hz - 21kHz (Manufacturer specified) | - |
| Active Noise Cancelling | Yes | Yes |
| Battery Life | 8 hours (24 with case, Manufacturer specified) | 7.5 hours (30 with case, Manufacturer specified) |
| Bluetooth Version | 5.2 | 5.4 |
| Bluetooth Codecs | SBC, AAC, aptX, aptX Adaptive | SBC, AAC, aptX, aptX Adaptive, aptX Lossless, LC3 |
| Built-in Microphone | Yes | Yes |
| IP Rating | IPX4 | IP54 |
Related Headphone Comparisons
How Sennheiser MOMENTUM True Wireless 4 compares with other leading options:
- 7Hz Eternal vs Sennheiser MOMENTUM True Wireless 4
- Sennheiser MOMENTUM True Wireless 4 vs FiiO FH7S
- Sennheiser MOMENTUM True Wireless 4 vs Muse HiFi Power
- Sennheiser MOMENTUM True Wireless 4 vs Etymotic ER4XR
- Sennheiser Momentum True Wireless 3 vs FiiO FH3
Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Headphones In Full
Sennheiser CX Plus True Wireless: $179.95 TWS Amazon $179.95 eBay
Pros: Supports aptX and aptX Adaptive along with AAC and SBC, so it streams well from Qualcomm based Android phones. Active noise cancelling, IPX4 splash resistance and 8 hours per charge (24 with the case) cover everyday use. Bass runs about 3 dB above target from 60 to 200 Hz in hobbyist measurements on squig.link, which appeals to listeners who want a bassy profile.
Cons: An 11.4 dB treble peak near 10.2 kHz makes cymbals and sibilance sharp and fatiguing, while a 6.6 dB shortfall from 3 to 6 kHz hollows out vocals. The response is very uneven at a 3.9 dB standard deviation, and the 1MORE Penta Driver matches its rating for less money.
Full Sennheiser CX Plus True Wireless review and specifications →
| Released | Sep 2021 (5 years ago) |
|---|---|
| Active Noise Cancelling | Yes |
| Back | Closed |
| Battery Life | 8 hours (24 with case, Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX Adaptive |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Connection | True wireless |
| Deviation From Target | 3.86 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 7mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 21kHz (Manufacturer specified) |
| Harman Preference Score | 51 (median of 1 squig.link measurements, calibrated to AutoEQ) |
| IP Rating | IPX4 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.6 dB at 30 Hz) |
| Tonal Tilt | -0.76 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6 g) per earbud |
- Reviews, Comparisons and Sound Samples
Sennheiser MOMENTUM True Wireless 4: $249.95 TWS Amazon $249.95 eBay
Older model: the Sennheiser Momentum True Wireless 3 (ranked higher, rated 3.4/5). See every Sennheiser Momentum True Wireless generation.
Pros: This true wireless set adds active noise cancelling, Bluetooth 5.4 and a codec list that runs from SBC and AAC up to aptX Lossless and LC3. Battery life is 7.5 hours per charge and 30 hours with the case, and IP54 resistance covers sweat and light rain. Oratory1990’s measurement shows bass about 0.6 dB above target, so low end is full without being overdone.
Cons: Presence from 3 to 6 kHz is about 6.9 dB under target, with an 8.2 dB dip near 5.7 kHz, so voices and guitars sound recessed. Air above 10 kHz runs 5 dB hot with a peak of 4.2 dB near 10.6 kHz, which can add a thin, sparkly edge. The Tin HiFi P1 Max has a higher rating, for a lower price.
Full Sennheiser MOMENTUM True Wireless 4 review and specifications →
| Released | Feb 2024 (2 years ago) |
|---|---|
| Active Noise Cancelling | Yes |
| Back | Closed |
| Battery Life | 7.5 hours (30 with case, Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX Adaptive, aptX Lossless, LC3 |
| Bluetooth Version | 5.4 |
| Built-in Microphone | Yes |
| Connection | True wireless |
| Deviation From Target | 2.63 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 7mm dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 65 (measured by oratory1990, via AutoEQ) |
| IP Rating | IP54 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Tonal Tilt | -0.74 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6.2 g) per earbud |
EQ preset to match the Harman target
Set a preamp of -6.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.1 dB | 0.70 |
| Peak | 5,605 Hz | +5.8 dB | 2.82 |
| Peak | 123 Hz | -2.8 dB | 0.23 |
| Peak | 3,977 Hz | +3.9 dB | 2.27 |
| Peak | 70 Hz | +2.1 dB | 0.97 |
| High shelf | 10,000 Hz | -5.2 dB | 0.70 |
| Peak | 1,511 Hz | -1.3 dB | 1.73 |
| Peak | 877 Hz | +0.8 dB | 2.46 |
| Peak | 7,841 Hz | +2.1 dB | 5.59 |
| Peak | 3,002 Hz | +0.7 dB | 3.65 |
- Reviews, Comparisons and Sound Samples
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