Coverage note. Speaker Ranking currently covers 4 Koss models across headphones. These are the products in our database, not a complete list of everything Koss makes.
What this page covers. The Koss models ranked here span headphones, including Koss KPH30i, Koss KPH40 and Koss KSC75. Use each model’s category position to compare it with alternatives of the same size and use case.
This page lists all 4 Koss speakers ranked on this site across headphones. Each model is shown in the category where it competes, with its current rank and the size of that ranking.
Use the category position rather than the brand name alone: speakers from the same manufacturer can perform very differently by size, price and product family.
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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Over-Ear Headphones
Ranked #67 of 134 in Over-Ear Headphones - 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.
Full Koss KPH30i review and specifications →
| 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 |
- Reviews, Comparisons and Sound Samples
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Ranked #115 of 134 in Over-Ear Headphones - Koss KPH40: $32.99 Amazon eBay
Pros: It is one of the cheapest options in its class, and the open-back design gives a more airy, spacious feel than most closed budget headsets. Bass between 60 and 200 Hz sits about 2 dB above target and the lower mids are slightly full, which suits a warm, relaxed listener. Sensitivity of 101 dB at 60 ohms means a phone can drive it.
Cons: Sub-bass rolls off about 7 dB below target under 60 Hz, so kick drums and synth bass lack rumble. A 14.5 dB dip near 4.4 kHz makes vocals and instrument detail sound distant, and treble is about 4 dB low overall, so the sound is dark and muffled. Open backs also leak sound and offer no isolation.
Full Koss KPH40 review and specifications →
| Back | Open |
|---|---|
| Connection | Wired |
| Deviation From Target | 3.35 dB standard deviation |
| Driver Type | Dynamic |
| Form Factor | Over-ear |
| Frequency Response | 15Hz - 25kHz (Manufacturer specified) |
| Harman Preference Score | 54 (measured by oratory1990, via AutoEQ) |
| Impedance | 60 ohms |
| Sensitivity | 101 dB SPL/1mW |
| Tonal Tilt | -1.21 (negative is warmer, positive brighter) |
EQ preset to match the 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +7.5 dB | 0.70 |
| Peak | 79 Hz | -7.6 dB | 0.37 |
| Peak | 3,725 Hz | +4.9 dB | 3.94 |
| Peak | 614 Hz | +1.5 dB | 2.05 |
| Peak | 37 Hz | +3.9 dB | 1.16 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 7,429 Hz | +4.0 dB | 0.78 |
| Peak | 5,445 Hz | -7.7 dB | 4.24 |
| Peak | 1,941 Hz | -2.0 dB | 2.35 |
| Peak | 1,012 Hz | +0.3 dB | 1.84 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ranked #116 of 134 in Over-Ear Headphones - Koss KSC75: $19.99 Amazon eBay
Pros: An extremely low cost and a featherweight 43 g clip-on design make it easy to carry and wear for long stretches. The midrange is close to target, with the low mids within 0.2 dB, so voices sound natural, and the slightly lifted treble of about 2 to 3 dB adds clarity. The open back gives an airy sound, and 101 dB sensitivity at 60 ohms works from a phone.
Cons: Sub-bass is about 17 dB below target under 60 Hz, so there is almost no rumble and bass-heavy music sounds thin. Bass in the 60 to 200 Hz range is also about 2 dB low, and a 4 dB peak near 5.3 kHz can add some edge. The open design leaks sound and gives no noise isolation.
Full Koss KSC75 review and specifications →
| Back | Open |
|---|---|
| Connection | Wired |
| Deviation From Target | 3.33 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 35mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 15Hz - 25kHz (Manufacturer specified) |
| Harman Preference Score | 54 (measured by oratory1990, via AutoEQ) |
| Impedance | 60 ohms |
| Sensitivity | 101 dB SPL/1mW |
| Tonal Tilt | +1.22 (negative is warmer, positive brighter) |
| Weight | 0.1 lbs (43 g) |
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 | +6.2 dB | 0.70 |
| Peak | 610 Hz | +2.2 dB | 0.63 |
| Peak | 2,358 Hz | -3.4 dB | 1.92 |
| Peak | 169 Hz | -2.3 dB | 0.77 |
| Peak | 74 Hz | +2.0 dB | 2.94 |
| High shelf | 10,000 Hz | -3.0 dB | 0.70 |
| Peak | 4,033 Hz | +3.3 dB | 5.88 |
| Peak | 5,191 Hz | -3.4 dB | 5.53 |
| Peak | 7,220 Hz | -1.5 dB | 2.25 |
| Peak | 4,517 Hz | +0.7 dB | 4.34 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ranked #126 of 134 in Over-Ear Headphones - Koss Porta Pro: $32.99 Amazon eBay
Pros: A very cheap, lightweight open-back design dating from 1984. At 60 ohms and 101 dB sensitivity it runs easily from a phone. The warm tilt and a mild 2.6 dB bass lift suit listeners who like a relaxed, bassy sound.
Cons: A 16.8 dB dip near 3.6 kHz hollows out vocals and instrument detail, and treble from 6 to 10 kHz is about 6 dB low. Sub-bass below 60 Hz sits about 6 dB under target. The open back leaks sound and provides no isolation, and the HyperX Cloud Alpha is rated clearly higher at a similar price.
Full Koss Porta Pro review and specifications →
| Released | 1984 (42 years ago) |
|---|---|
| Back | Open |
| Connection | Wired |
| Deviation From Target | 3.55 dB standard deviation |
| Driver Type | Dynamic |
| Form Factor | Over-ear |
| Frequency Response | 15Hz - 25kHz (Manufacturer specified) |
| Harman Preference Score | 46 (measured by oratory1990, via AutoEQ) |
| Impedance | 60 ohms |
| Sensitivity | 101 dB SPL/1mW |
| Tonal Tilt | -1.50 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -7.9 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 | +9.2 dB | 0.70 |
| Peak | 83 Hz | -8.7 dB | 0.47 |
| Peak | 3,336 Hz | +4.3 dB | 4.55 |
| Peak | 8,898 Hz | +5.8 dB | 2.75 |
| Peak | 6,711 Hz | +4.5 dB | 4.32 |
| High shelf | 10,000 Hz | +4.5 dB | 0.70 |
| Peak | 4,725 Hz | -3.8 dB | 6.00 |
| Peak | 1,892 Hz | -1.6 dB | 2.53 |
| Peak | 658 Hz | +0.6 dB | 1.45 |
| Peak | 2,756 Hz | +1.5 dB | 4.62 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons