The Sennheiser IE 40 Pro ranks #41 out of 68 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Sennheiser
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#41 Sennheiser IE 40 Pro: $109.00 Amazon eBay
Pros: Oratory1990’s measurement shows bass 1.0 dB and low mids 1.4 dB above target, a gentle warmth that suits relaxed listening, and the preference score of 67 is acceptable. A 20 ohm impedance and 115 dB SPL/V sensitivity mean a phone drives it with ease, which suits monitoring and portable use. The balance leans toward warm and V-shaped tastes.
Cons: Presence is 4.5 dB under target across 3 to 6 kHz, with a 6.4 dB dip near 3.1 kHz, so vocals and guitars sound recessed and detail is dulled. Sub-bass is 3.6 dB light, so deep rumble is absent. Then the top end swings the opposite way, with a peak of 8.3 dB at 11.9 kHz and air 5.7 dB over target, which can add a brittle sheen. Tonal balance is clearly uneven, with a deviation of 2.94 dB.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.94 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 18kHz (Manufacturer specified) |
| Harman Preference Score | 67 (measured by oratory1990, via AutoEQ) |
| Impedance | 20 ohms |
| Sensitivity | 115 dB SPL/V |
| Tonal Tilt | +0.03 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -5.6 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 | +5.6 dB | 0.70 |
| Peak | 2,997 Hz | +5.7 dB | 1.48 |
| Peak | 75 Hz | -4.1 dB | 0.38 |
| Peak | 1,267 Hz | -0.8 dB | 2.09 |
| Peak | 261 Hz | -1.1 dB | 1.70 |
| High shelf | 10,000 Hz | -3.7 dB | 0.70 |
| Peak | 9,787 Hz | -3.3 dB | 1.71 |
| Peak | 4,341 Hz | +1.1 dB | 3.77 |
| Peak | 6,644 Hz | +2.1 dB | 5.97 |
| Peak | 7,958 Hz | -1.2 dB | 5.41 |
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