![Many headphones have this dip around 9 kHz in frequency response graph. Can you help me understand what causes this dip and what the impact it has on sound quality? : r/headphones Many headphones have this dip around 9 kHz in frequency response graph. Can you help me understand what causes this dip and what the impact it has on sound quality? : r/headphones](https://i.redd.it/9ve3mdn3liq91.png)
Many headphones have this dip around 9 kHz in frequency response graph. Can you help me understand what causes this dip and what the impact it has on sound quality? : r/headphones
Why do many headphones have output frequency of 5Hz to 22000Hz even though humans can hear 20 to 20000Hz only? - Quora
![Open-back Sennheiser HD 660S2 headphones boast wider soundstage and crisper low frequency response - Yanko Design Open-back Sennheiser HD 660S2 headphones boast wider soundstage and crisper low frequency response - Yanko Design](https://www.yankodesign.com/images/design_news/2023/02/open-back-sennheiser-hd-660s2-headphones-boast-wide-soundstage-and-crisp-low-frequency-response/Sennheiser-HD-660S2-Headphones-8.jpg)
Open-back Sennheiser HD 660S2 headphones boast wider soundstage and crisper low frequency response - Yanko Design
![Open-back Sennheiser HD 660S2 headphones boast wider soundstage and crisper low frequency response - Yanko Design Open-back Sennheiser HD 660S2 headphones boast wider soundstage and crisper low frequency response - Yanko Design](https://www.yankodesign.com/images/design_news/2023/02/open-back-sennheiser-hd-660s2-headphones-boast-wide-soundstage-and-crisp-low-frequency-response/Sennheiser-HD-660S2-Headphones-11.jpg)