> For the complete documentation index, see [llms.txt](https://itsgreq.gitbook.io/headphone-measurements/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://itsgreq.gitbook.io/headphone-measurements/koss.md).

# 🗃️ KOSS

- [1010 Heritage](https://itsgreq.gitbook.io/headphone-measurements/koss/1010-heritage.md)
- [HV/99 (Interfunk)](https://itsgreq.gitbook.io/headphone-measurements/koss/hv-99-interfunk.md): Dayum... Should be less bassy with stock foam. But this is fun too.
- [HV/X](https://itsgreq.gitbook.io/headphone-measurements/koss/hv-x.md)
- [K/6X Plus + On Ear Pads](https://itsgreq.gitbook.io/headphone-measurements/koss/k-6x-plus-+-on-ear-pads.md): It's something
- [K/6X Plus + Aftermarket MDR-1A Pads](https://itsgreq.gitbook.io/headphone-measurements/koss/k-6x-plus-+-on-ear-pads/k-6x-plus-+-aftermarket-mdr-1a-pads.md)
- [K6/LC](https://itsgreq.gitbook.io/headphone-measurements/koss/k6-lc.md)
- [KO/747](https://itsgreq.gitbook.io/headphone-measurements/koss/ko-747.md)
- [Porta Pro](https://itsgreq.gitbook.io/headphone-measurements/koss/koss-porta-pro.md)
- [Pro/450](https://itsgreq.gitbook.io/headphone-measurements/koss/pro-450.md)
- [Pro4/AA](https://itsgreq.gitbook.io/headphone-measurements/koss/pro4-aa.md): Old deflated pads create a VERY unreliable graph
- [Koss Pro4/AA + pressure applied](https://itsgreq.gitbook.io/headphone-measurements/koss/pro4-aa/koss-pro4-aa-+-pressure-applied.md): Artificial pressure applied with elastic to force a strong bass seal between pads and silicone ears
- [Pro4/AA + Fostex T50RPmkII Pads](https://itsgreq.gitbook.io/headphone-measurements/koss/pro4-aa/pro4-aa-+-fostex-t50rpmkii-pads.md): Much more reliable graph, and almost no deviation from pressurized stock pad sound.
- [Tech/2](https://itsgreq.gitbook.io/headphone-measurements/koss/tech-2.md)