The OLLO S4R ranks #157 out of 202 total Over-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
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#157 OLLO S4R: $289.00 OLLO Audio eBay
Pros: It is a closed back wired headphone with a 50 ohm, 106 dB SPL sensitive 50 mm driver that plays loudly from a phone or interface without a dedicated amp. In oratory1990’s measurement, bass holds within 2 dB of target at 30 Hz and upper bass gets a 2.5 dB lift, which suits listeners who like a warm, bass forward tone. It is rated a touch higher than the more expensive Austrian Audio Hi-X55 and Focal Listen Professional.
Cons: Its preference score is only 60.0 with a 3.28 dB deviation, so the tonal balance is uneven overall. A deep 13.9 dB dip near 7 kHz and treble averaging 5.7 dB below target from 6 to 10 kHz make cymbals and detail sound muffled. At 420 g it is also on the heavy side.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 3.28 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 50mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 15Hz - 22kHz (Manufacturer specified) |
| Harman Preference Score | 60 (measured by oratory1990, via AutoEQ) |
| Impedance | 50 ohms |
| Sensitivity | 106 dB SPL @ 0 dBu |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) |
| Tonal Tilt | -0.85 (negative is warmer, positive brighter) |
| Weight | 0.9 lbs (420 g) |
EQ preset to match the Harman 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.6 dB | 0.70 |
| Peak | 188 Hz | -5.9 dB | 0.48 |
| Peak | 409 Hz | +9.7 dB | 1.70 |
| Peak | 2,060 Hz | -3.3 dB | 2.18 |
| Peak | 7,656 Hz | +4.9 dB | 3.00 |
| High shelf | 10,000 Hz | -0.1 dB | 0.70 |
| Peak | 36 Hz | +3.9 dB | 4.97 |
| Peak | 51 Hz | -1.8 dB | 2.71 |
| Peak | 3,962 Hz | -2.9 dB | 5.89 |
| Peak | 3,178 Hz | +2.9 dB | 6.00 |
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