The KZ ASF ranks #818 out of 865 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: KZ
Prices on this page were last checked October 13, 2026 at 3:17 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.
As an eBay Partner, we may be compensated if you make a purchase.
#818 KZ ASF Discontinued eBay
Pros: Bass is lifted about 6.6 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Lower mids sit within about 1.1 dB of target, keeping voices and guitars natural. It uses 5 x balanced armature with an easy 18 ohm load.
Cons: Discontinued, so it is mainly found used. A 7.2 dB peak near 1.5 kHz can make cymbals and sibilance sound sharp. The 6.6 dB bass lift can sound boomy and mask midrange detail. A Harman score of 46 places it in the lower part of the in-ear rankings.
| Released | 2020 (6 years ago) |
|---|---|
| Connection | Wired |
| Deviation From Target | 3.81 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 5 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 40kHz |
| Harman Preference Score | 46 (measured by crinacle, via AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 105 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+3.6 dB at 30 Hz) |
| Tonal Tilt | -1.26 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.7 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 | -2.2 dB | 0.70 |
| Peak | 8,437 Hz | +6.9 dB | 1.91 |
| Peak | 170 Hz | -4.8 dB | 0.75 |
| Peak | 741 Hz | +5.5 dB | 0.90 |
| Peak | 1,647 Hz | -6.7 dB | 1.65 |
| High shelf | 10,000 Hz | +5.3 dB | 0.70 |
| Peak | 5,193 Hz | -5.4 dB | 5.23 |
| Peak | 4,349 Hz | +2.4 dB | 6.00 |
| Peak | 3,314 Hz | +1.6 dB | 4.47 |
| Peak | 8,711 Hz | -2.5 dB | 5.93 |
- Reviews, Comparisons and Sound Samples