The BLON Fat Girl ranks #612 out of 1061 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: BLON
Prices on this page were last checked October 15, 2026 at 5:41 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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#612 BLON Fat Girl: $56.99 Amazon $56.99 eBay
Pros: A single dynamic IEM in a bullet style metal shell. Measurements show full sub-bass to 20 Hz (score 68 across nine measurements).
Cons: Bass sits about 4.0 dB above target, a bass heavy balance.
Is the BLON Fat Girl right for you?
Buy it if
- you like extra bass (about +4 dB below 150 Hz versus the target).
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 18 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $33 less.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.20 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 68 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.1 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -0.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 86 out of 100, up from 68.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -3.4 dB | 0.70 |
| High shelf | 10,000 Hz | -0.8 dB | 0.70 |
| Peak | 187 Hz | -6.1 dB | 0.81 |
| Peak | 5,437 Hz | -3.6 dB | 3.49 |
Neutral target
Set a preamp of -1.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 92 out of 100, up from 30.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.9 dB | 0.70 |
| High shelf | 10,000 Hz | -0.8 dB | 0.70 |
| Peak | 178 Hz | -5.8 dB | 0.71 |
| Peak | 828 Hz | +2.0 dB | 2.58 |
| Peak | 2,695 Hz | -2.0 dB | 4.76 |
| Peak | 5,437 Hz | -3.6 dB | 3.52 |
| Peak | 8,000 Hz | -2.3 dB | 6.00 |
Studio flat target
Set a preamp of -2.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 84 out of 100, up from 11.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 175 Hz | -8.3 dB | 0.74 |
| Peak | 858 Hz | +1.9 dB | 2.22 |
| Peak | 5,465 Hz | -5.6 dB | 4.02 |
Warm target
Set a preamp of -1.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 92 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -3.1 dB | 0.70 |
| High shelf | 10,000 Hz | -4.4 dB | 0.70 |
| Peak | 182 Hz | -5.9 dB | 0.86 |
| Peak | 320 Hz | -0.9 dB | 2.93 |
| Peak | 854 Hz | +2.4 dB | 2.36 |
| Peak | 2,697 Hz | -1.4 dB | 5.95 |
| Peak | 3,955 Hz | +1.9 dB | 5.93 |
| Peak | 5,439 Hz | -1.6 dB | 6.00 |
| Peak | 6,320 Hz | -3.8 dB | 0.46 |
Bass target
Set a preamp of -0.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 87 out of 100, up from 75.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.4 dB | 0.70 |
| High shelf | 10,000 Hz | -0.8 dB | 0.70 |
| Peak | 189 Hz | -6.1 dB | 0.84 |
| Peak | 5,437 Hz | -3.5 dB | 3.47 |
Bright target
Set a preamp of -2.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 92 out of 100, up from 22.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.9 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 178 Hz | -5.9 dB | 0.71 |
| Peak | 826 Hz | +1.9 dB | 2.81 |
| Peak | 2,642 Hz | -1.5 dB | 3.89 |
| Peak | 4,051 Hz | +2.3 dB | 4.55 |
| Peak | 6,817 Hz | +2.0 dB | 5.10 |
V-shaped target
Set a preamp of -2.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 91 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.1 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 184 Hz | -4.8 dB | 0.86 |
| Peak | 800 Hz | +1.3 dB | 3.08 |
| Peak | 2,708 Hz | -1.2 dB | 5.20 |
| Peak | 4,128 Hz | +2.5 dB | 2.60 |
| Peak | 6,734 Hz | +1.8 dB | 4.06 |
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Frequency Response
How the BLON Fat Girl measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is the median of 9 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 9 measurements from the squig.link databases of achoreviews, aftersound, eplv, harpo, hbb, ianfann, jacstone, pw and vortexreviews. Thanks to each of them for publishing their work.