The Koss KPH30i ranks #67 out of 134 total Over-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Koss
Prices on this page were last checked October 10, 2026 at 5:37 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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#67 Koss KPH30i: $23.99 Amazon eBay
Pros: A very low price makes it an easy disposable or backup pair, and the 60 ohm, 101 dB sensitivity runs from any phone. It has an inline microphone for calls and the open on-ear design is light and airy. Bass from 60 Hz to the upper mids stays within about 0.6 dB of the Harman target, which gives a fairly balanced core.
Cons: Sub-bass is nearly 12 dB under target below 60 Hz, so there is no rumble and deep bass is essentially missing. An 11.8 dB dip near 4.2 kHz makes vocals and detail recede, and treble from 3 to 10 kHz is about 2.8 dB low. The open back leaks sound and offers no isolation, so it suits quiet rooms only.
| Back | Open |
|---|---|
| Built-in Microphone | Yes |
| Connection | Wired |
| Deviation From Target | 2.62 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 35mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 15Hz - 25kHz (Manufacturer specified) |
| Harman Preference Score | 76 (measured by oratory1990, via AutoEQ) |
| Impedance | 60 ohms |
| Sensitivity | 101 dB SPL/1mW |
| Tonal Tilt | -0.38 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.3 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 | +6.8 dB | 0.70 |
| Peak | 109 Hz | -4.7 dB | 0.47 |
| Peak | 2,979 Hz | +1.7 dB | 0.18 |
| Peak | 1,956 Hz | -4.1 dB | 2.01 |
| Peak | 49 Hz | +2.5 dB | 2.08 |
| High shelf | 10,000 Hz | +0.1 dB | 0.70 |
| Peak | 5,070 Hz | -5.0 dB | 5.22 |
| Peak | 3,844 Hz | +2.9 dB | 5.95 |
| Peak | 6,348 Hz | +2.6 dB | 5.99 |
| Peak | 502 Hz | +0.3 dB | 1.44 |
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