Short answer: a tie on sound quality. Both are rated 4.5/5 (#61 and #63 of 450 in-ear headphones), so choose on features and fit.
The case for the Final Audio A4000: A preference score of 80 and a deviation of only 1.67 dB from target make this one of the most accurate single dynamic driver in-ears available at its price. The catch: Treble runs about 6 to 7 dB above target from 6 to 16 kHz in hobbyist measurements on squig.link, with an 8.7 dB peak near 8.7 kHz that can make bright recordings sharp.
What the Simgot EM6L does well: Crinacle’s measurement returns a preference score of 80, and a deviation of only 1.51 dB means few uneven spots anywhere in the range. The tradeoff: The air band rises 5.5 dB above target with a 6.7 dB peak near 11.9 kHz, which some listeners will hear as extra sparkle or sharpness on cymbals.
Buy the Final Audio A4000 or the Simgot EM6L on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| Final Audio A4000 | Simgot EM6L | |
|---|---|---|
| Price | $125.00 | - |
| Ranked | #61 of 450 in In-Ear Headphones | #63 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 80 (measured by crinacle, via AutoEQ) | 80 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 1.67 dB standard deviation | 1.51 dB standard deviation |
| Tonal Tilt | +0.11 (negative is warmer, positive brighter) | -0.31 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 6mm dynamic | 1 x 8mm dynamic + 4 x balanced armature |
| Impedance | 18 ohms | 26 ohms |
| Sensitivity | 100 dB/mW | 119 dB/Vrms |
| Weight | 0 lbs (18 g) | 0 lbs (7 g) per earbud |
| Built-in Microphone | No | - |
| Back | Closed | Closed |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) |
| Frequency Response | - | 8Hz - 40kHz (Manufacturer specified) |
Related Headphone Comparisons
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- Final Audio A4000 vs Shuoer S12
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- Final Audio A4000 vs Kefine Quatio
- Shuoer S12 vs Simgot EM6L
- Simgot EM6L vs Symphonium Audio Helios
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
Final Audio A4000: $125.00 Amazon eBay
Pros: A preference score of 80 and a deviation of only 1.67 dB from target make this one of the most accurate single dynamic driver in-ears available at its price. Sub-bass holds within 1 dB of target down to 20 Hz, and a 3 dB lift in the upper bass adds warmth and punch. It matches the Shuoer S12 in rating while costing less, and at 18 g it is very light.
Cons: Treble runs about 6 to 7 dB above target from 6 to 16 kHz in hobbyist measurements on squig.link, with an 8.7 dB peak near 8.7 kHz that can make bright recordings sharp. Listeners sensitive to sibilance may find it fatiguing at high volume. At 100 dB/mW it needs a bit more volume than very sensitive in-ears, though phones still drive it.
Full Final Audio A4000 review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.67 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 6mm dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 80 (measured by crinacle, via AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 100 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Tonal Tilt | +0.11 (negative is warmer, positive brighter) |
| Weight | 0 lbs (18 g) |
EQ preset to match the Harman target
Set a preamp of -2.9 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 | +0.5 dB | 0.70 |
| Peak | 831 Hz | +3.0 dB | 1.09 |
| Peak | 177 Hz | -1.6 dB | 1.02 |
| Peak | 6,348 Hz | -3.7 dB | 2.04 |
| Peak | 2,022 Hz | +2.0 dB | 3.11 |
| High shelf | 10,000 Hz | -3.9 dB | 0.70 |
| Peak | 9,639 Hz | +2.1 dB | 2.54 |
| Peak | 3,246 Hz | -2.0 dB | 3.75 |
| Peak | 4,630 Hz | +0.9 dB | 3.78 |
| Peak | 2,482 Hz | +0.9 dB | 5.02 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Simgot EM6L AliExpress eBay
Pros: Crinacle’s measurement returns a preference score of 80, and a deviation of only 1.51 dB means few uneven spots anywhere in the range. Across 46 hobbyist measurements on squig.link the presence and upper mids sit within 0.3 dB of target, so vocals and instruments sound natural, while bass about 2.5 dB above target adds warmth. With 119 dB/V sensitivity and 26 ohms it drives easily from a phone or basic dongle.
Cons: The air band rises 5.5 dB above target with a 6.7 dB peak near 11.9 kHz, which some listeners will hear as extra sparkle or sharpness on cymbals. It is wired only and lists no microphone.
Full Simgot EM6L review and specifications →
| Released | 2023 (3 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.51 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 8mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 8Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 80 (measured by crinacle, via AutoEQ) |
| Impedance | 26 ohms |
| Sensitivity | 119 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) |
| Tonal Tilt | -0.31 (negative is warmer, positive brighter) |
| Weight | 0 lbs (7 g) per earbud |
EQ preset to match the Harman target
Set a preamp of -1.9 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 | +0.5 dB | 0.70 |
| Peak | 176 Hz | -2.5 dB | 0.73 |
| Peak | 839 Hz | +2.1 dB | 1.27 |
| Peak | 8,479 Hz | +1.8 dB | 2.59 |
| Peak | 5,586 Hz | +1.6 dB | 4.29 |
| High shelf | 10,000 Hz | -1.8 dB | 0.70 |
| Peak | 3,212 Hz | -0.8 dB | 2.70 |
| Peak | 2,167 Hz | +0.8 dB | 2.93 |
| Peak | 37 Hz | -0.2 dB | 2.16 |
| Peak | 1,399 Hz | -0.4 dB | 3.64 |
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- Head-to-Head Comparisons