> 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/pioneer.md).

# 🗃️ PIONEER

- [Master 1G](https://itsgreq.gitbook.io/headphone-measurements/pioneer/master-1g.md)
- [SE-2](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-13.md)
- [SE-4](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-4.md): It just sounds OK
- [SE-7 + New Pleather Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-12.md)
- [SE-7 + New Velour Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-12/untitled-11.md)
- [SE-11 Eleven 300 ohm variant](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-9.md)
- [SE-11 Eleven + New Velour Pads - 300 Ohm variant](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-9/untitled-10.md): Might be the best all-round Japanese vintage open-back
- [SE-11 eleven - Over Ear Mod + HyperX Cloud Velour Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-9/se-11-eleven-over-ear-mod-+-hyperx-cloud-velour-pads.md): Touch less sub-bass due to these pads.
- [SE-15](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-15.md)
- [SE-15 + aftermarket pleather pad](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-15/untitled-7.md): With modern, slightly thicker new pleather pads
- [SE-15 + Vesper Audio hybrid pad](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-15/se-15-+-vesper-audio-hybrid-pad.md)
- [SE-15 + Turtle Beach PX21 Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-15/untitled-8.md)
- [SE-20A](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-20a.md)
- [SE-505](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-6.md): One of the world's first dual-driver headphones
- [SE-550](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-5.md)
- [SE-700](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-3.md): This graph is with the original ear pads. The treble peak should stay strong above 8KHz according to manual tone-sweeps.
- [SE-700 + Brainwavs Angled Leather Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-3/se-700-+-brainwavs-angled-leather-pads.md): meh
- [SE-700 + New Pleather Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-3/untitled-4.md)
- [SE-900D](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-1.md)
- [SE-900D - Mod](https://itsgreq.gitbook.io/headphone-measurements/pioneer/untitled-1/se-900d-mod.md)
- [SE-A8](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-a8.md)
- [SE-A80](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-a80.md)
- [SE-M750](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-m750.md): Right driver is faulty
- [SE-M870 + Z1000 Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-m870-+-z1000-pads.md)
- [SE-M870 + SW02 Pads](https://itsgreq.gitbook.io/headphone-measurements/pioneer/se-m870-+-z1000-pads/se-m870-+-sw02-pads.md): More V-shaped than Z1000 pads


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://itsgreq.gitbook.io/headphone-measurements/pioneer.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.