The ROSESELSA CJ20 ranks #677 out of 1253 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Roseselsa
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#677 ROSESELSA CJ20: $169 HiFiGo $169 eBay
Pros: A broadly balanced tuning with a preference score of 70 against the Harman target.
Cons: An uneven response, 2.2 dB standard deviation from target.
Is the ROSESELSA CJ20 right for you?
Buy it if
- 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 23 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $145 less.
| Back | Closed |
|---|---|
| Connection | Wired (3.5mm) |
| Deviation From Target | 2.15 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 Dynamic (10mm topological) |
| Form Factor | In-ear |
| Harman Preference Score | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.3 dB at 30 Hz) |
| Tonal Tilt | -0.47 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -6.1 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 93 out of 100, up from 70.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.4 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 174 Hz | -1.6 dB | 1.40 |
| Peak | 648 Hz | +1.6 dB | 1.90 |
| Peak | 1,455 Hz | -0.8 dB | 2.73 |
| Peak | 2,009 Hz | -3.8 dB | 3.09 |
| Peak | 3,241 Hz | +2.6 dB | 6.00 |
| Peak | 4,310 Hz | +6.0 dB | 1.97 |
| Peak | 5,879 Hz | +1.9 dB | 6.00 |
| Peak | 7,839 Hz | -2.1 dB | 6.00 |
Neutral target
Set a preamp of -6.1 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 94 out of 100, up from 32.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.9 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 35 Hz | -0.5 dB | 0.40 |
| Peak | 174 Hz | -1.5 dB | 1.09 |
| Peak | 634 Hz | +1.6 dB | 1.75 |
| Peak | 2,010 Hz | -3.8 dB | 3.09 |
| Peak | 3,241 Hz | +2.6 dB | 6.00 |
| Peak | 4,310 Hz | +6.0 dB | 1.96 |
| Peak | 5,880 Hz | +1.9 dB | 6.00 |
| Peak | 7,839 Hz | -2.1 dB | 6.00 |
Studio flat target
Set a preamp of -6.2 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 88 out of 100, up from 17.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.7 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 154 Hz | -3.4 dB | 0.79 |
| Peak | 1,927 Hz | -2.9 dB | 3.58 |
| Peak | 3,573 Hz | +6.0 dB | 1.97 |
| Peak | 5,092 Hz | +1.5 dB | 2.81 |
Warm target
Set a preamp of -4.3 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 89 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.1 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 174 Hz | -1.4 dB | 1.19 |
| Peak | 676 Hz | +1.9 dB | 2.05 |
| Peak | 2,034 Hz | -4.4 dB | 2.96 |
| Peak | 3,241 Hz | +2.3 dB | 6.00 |
| Peak | 4,120 Hz | +4.3 dB | 2.82 |
| Peak | 7,656 Hz | -4.0 dB | 6.00 |
Bass target
Set a preamp of -6.1 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 94 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.4 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 174 Hz | -1.6 dB | 1.51 |
| Peak | 651 Hz | +1.6 dB | 1.94 |
| Peak | 1,454 Hz | -0.8 dB | 2.73 |
| Peak | 2,009 Hz | -3.8 dB | 3.09 |
| Peak | 3,240 Hz | +2.6 dB | 6.00 |
| Peak | 4,310 Hz | +6.0 dB | 1.97 |
| Peak | 5,879 Hz | +1.9 dB | 6.00 |
| Peak | 7,839 Hz | -2.1 dB | 6.00 |
Bright target
Set a preamp of -6.4 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 90 out of 100, up from 24.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.9 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 174 Hz | -1.6 dB | 1.02 |
| Peak | 625 Hz | +1.5 dB | 1.76 |
| Peak | 1,974 Hz | -4.0 dB | 3.43 |
| Peak | 2,367 Hz | -1.7 dB | 6.00 |
| Peak | 3,457 Hz | +3.8 dB | 3.82 |
| Peak | 5,345 Hz | +6.0 dB | 1.09 |
V-shaped target
Set a preamp of -6.8 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 90 out of 100, up from 71.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +3.1 dB | 0.70 |
| High shelf | 10,000 Hz | -5.5 dB | 0.70 |
| Peak | 518 Hz | +1.6 dB | 1.43 |
| Peak | 1,287 Hz | -1.0 dB | 3.70 |
| Peak | 1,961 Hz | -3.6 dB | 2.57 |
| Peak | 3,393 Hz | +3.7 dB | 5.24 |
| Peak | 4,037 Hz | +1.2 dB | 4.31 |
| Peak | 5,345 Hz | +6.0 dB | 0.99 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the ROSESELSA CJ20 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 3 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 3 measurements from the squig.link databases of atechreviews, hbb and jaytiss. Thanks to each of them for publishing their work.