Short answer: the Etymotic ER4SR, though neither ranks well in its class. It ranks #440 of 450 in-ear headphones by sound quality, rated 1.7/5, at $299.99. The Sennheiser Momentum True Wireless 2 ranks #441, rated 1.6/5, at $243.44, $56.55 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 450 in-ear headphones, so if sound quality matters, consider the Truthear Nova instead, ranked #2 at $169.99.
The case for the Etymotic ER4SR: For listeners who prefer a flat, studio style sound, the midrange from 200 Hz to 3 kHz stays within about 1 dB of target and its largest upper range peak is only 1.6 dB, so vocals come through clear without any glare. The tradeoff: Sub-bass sits about 11 dB below target and falls 6 dB short at 75 Hz, so bass heavy music sounds lean and lacks impact.
The case for the Sennheiser Momentum True Wireless 2: Active noise cancelling, Bluetooth 5.1 with SBC, AAC and aptX, and an IPX4 rating cover the features commuters and gym users want. The tradeoff: In oratory1990’s measurement the presence region from 3 to 6 kHz is about 9.6 dB below target, with a 10.7 dB dip near 4 kHz, so vocals and instrument attack sound pushed back and hazy.
Buy the Etymotic ER4SR. It is rated higher for sound quality, and the $56.55 you would save on the Sennheiser Momentum True Wireless 2 does not close the gap.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Etymotic ER4SR | Sennheiser Momentum True Wireless 2 | |
|---|---|---|
| Price | $299.99 | $243.44 |
| Ranked | #440 of 450 in In-Ear Headphones | #441 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 45 (measured by oratory1990, via AutoEQ) | 44 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 4.26 dB standard deviation | 4.39 dB standard deviation |
| Tonal Tilt | +1.38 (negative is warmer, positive brighter) | -0.89 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 75 Hz (-10.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.5 dB at 30 Hz) |
| Connection | Wired | True wireless |
| Driver Type | Balanced armature | Dynamic |
| Drivers | 1 x balanced armature | 1 x 7mm dynamic |
| Impedance | 45 ohms | - |
| Sensitivity | 98 dB/mW | - |
| Frequency Response | 20Hz - 16kHz (Manufacturer specified) | 5Hz - 21kHz (Manufacturer specified) |
| Built-in Microphone | No | Yes |
| Weight | - | 0 lbs (6 g) per earbud |
| Active Noise Cancelling | - | Yes |
| Battery Life | - | 7 hours (28 with case, Manufacturer specified) |
| Bluetooth Version | - | 5.1 |
| Bluetooth Codecs | - | SBC, AAC, aptX |
| IP Rating | - | IPX4 |
Related Headphone Comparisons
More top alternatives to Etymotic ER4SR:
- Shure SE425 vs Etymotic ER4SR
- Audio-Technica ATH-E70 vs Etymotic ER4SR
- Etymotic ER4SR vs Mackie MP-360
- Etymotic ER4SR vs EarSonics ES2
- Etymotic ER4XR vs Sennheiser Momentum True Wireless 2
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Headphones In Full
Etymotic ER4SR: $299.99 B&H Photo Video eBay
Pros: For listeners who prefer a flat, studio style sound, the midrange from 200 Hz to 3 kHz stays within about 1 dB of target and its largest upper range peak is only 1.6 dB, so vocals come through clear without any glare. It is rated level with the Audio-Technica ATH-E70 and Mackie MP-360, which cost more.
Cons: Sub-bass sits about 11 dB below target and falls 6 dB short at 75 Hz, so bass heavy music sounds lean and lacks impact. Treble about 6 dB low from 6 to 10 kHz and a 9 dB dip near 11.7 kHz take away air and shimmer. Its 98 dB/mW sensitivity is on the low side for an in ear, so it needs more volume than most.
Full Etymotic ER4SR review and specifications →
| Released | 2016 (10 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 4.26 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 16kHz (Manufacturer specified) |
| Harman Preference Score | 45 (measured by oratory1990, via AutoEQ) |
| Impedance | 45 ohms |
| Sensitivity | 98 dB/mW |
| Sub-bass Extension | Falls 6 dB below target at 75 Hz (-10.6 dB at 30 Hz) |
| Tonal Tilt | +1.38 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.0 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 | +6.0 dB | 0.70 |
| Peak | 2,470 Hz | -3.7 dB | 0.94 |
| Peak | 7,389 Hz | +6.4 dB | 1.15 |
| Peak | 77 Hz | +1.2 dB | 2.20 |
| Peak | 1,450 Hz | -1.8 dB | 2.27 |
| High shelf | 10,000 Hz | +2.5 dB | 0.70 |
| Peak | 269 Hz | -0.5 dB | 1.17 |
| Peak | 745 Hz | +0.5 dB | 2.09 |
| Peak | 7,552 Hz | -0.8 dB | 4.20 |
| Peak | 9,634 Hz | -1.0 dB | 5.99 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Sennheiser Momentum True Wireless 2: $243.44 TWS Amazon eBay
Pros: Active noise cancelling, Bluetooth 5.1 with SBC, AAC and aptX, and an IPX4 rating cover the features commuters and gym users want. Battery life is rated at 7 hours per charge and 28 with the case, and each earbud weighs only 6 g. Bass is lifted by about 3.1 dB over target, which suits listeners who want a warm, punchy sound.
Cons: In oratory1990’s measurement the presence region from 3 to 6 kHz is about 9.6 dB below target, with a 10.7 dB dip near 4 kHz, so vocals and instrument attack sound pushed back and hazy. A 5.2 dB peak near 10.8 kHz and boosted air then add an uneven sparkle on top, and sub-bass is down 2.3 dB. The preference score of 44 is low, and the rating sits below the Jabra Elite Active 65t.
Full Sennheiser Momentum True Wireless 2 review and specifications →
| Released | Apr 2020 (6 years ago) |
|---|---|
| Active Noise Cancelling | Yes |
| Back | Closed |
| Battery Life | 7 hours (28 with case, Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Connection | True wireless |
| Deviation From Target | 4.39 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 7mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 21kHz (Manufacturer specified) |
| Harman Preference Score | 44 (measured by oratory1990, via AutoEQ) |
| IP Rating | IPX4 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.5 dB at 30 Hz) |
| Tonal Tilt | -0.89 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6 g) per earbud |
EQ preset to match the Harman target
Set a preamp of -7.0 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 | +6.4 dB | 0.70 |
| Peak | 85 Hz | -6.9 dB | 0.26 |
| Peak | 3,202 Hz | +6.5 dB | 1.25 |
| Peak | 1,638 Hz | -1.6 dB | 2.70 |
| Peak | 5,340 Hz | +4.9 dB | 3.93 |
| High shelf | 10,000 Hz | -3.3 dB | 0.70 |
| Peak | 736 Hz | +1.0 dB | 1.92 |
| Peak | 334 Hz | -0.6 dB | 2.45 |
| Peak | 4,354 Hz | +1.0 dB | 4.95 |
| Peak | 199 Hz | -0.5 dB | 3.18 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sennheiser Momentum True Wireless 2 vs Oriolus Finschi Hifi
- Sennheiser Momentum True Wireless 2 vs Westone W10
- Sennheiser Momentum True Wireless 2 vs Westone W20
- Sennheiser Momentum True Wireless 2 vs Shure SE425
- Sennheiser Momentum True Wireless 2 vs EarSonics ES2
- Sennheiser Momentum True Wireless 2 vs Jabra Elite Active 65t
- Sennheiser Momentum True Wireless 2 vs Etymotic ER4XR
- Sennheiser Momentum True Wireless 2 vs Sennheiser Momentum True Wireless 3