> 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/akg/akg-k551-+-foam-spacer.md).

# AKG K551 + foam spacer

Same urethane foam treble attenuater plus a foam spacer ring stuffed inside the ear pads - gives sub bass a healthy boost and opens up soundstage slightly. \
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Resolution and especially soundstage are lacking.

<figure><img src="/files/HeYSRMnkEmq4LX1ykodp" alt=""><figcaption></figcaption></figure>

![Detachable remote cable replaced with permanent silver plated copper](/files/-MbVCZWwlPH8xAsq4NQp)