# Bottlehead Crack OTL AMP (Kit/DIY) - Official Thread

**URL:** <https://forum.headphones.com/t/bottlehead-crack-otl-amp-kit-diy-official-thread/1937>\
**Category:** DACs and Digital\
**Tags:** diy, bottlehead, kit\
**Created:** [August 21, 2018, 4:27pm UTC](https://forum.headphones.com/t/bottlehead-crack-otl-amp-kit-diy-official-thread/1937 "2018-08-21T16:27:23Z")\
**Posts on this page:** 1\
**Showing post:** 271

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**Author:** ![PaisleyUnderground](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.headphones.com/paisleyunderground/32/15919_2.png) [@PaisleyUnderground](https://forum.headphones.com/u/PaisleyUnderground)\
**Post date:** [March 11, 2021, 4:10pm UTC](https://forum.headphones.com/t/bottlehead-crack-otl-amp-kit-diy-official-thread/1937/271 "2021-03-11T16:10:09Z")

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@monochromios seems to have inadvertently answered this question because he referenced an older post in the Pendant thread, and when I scrolled up to take a look, I found this conversation about the Crack.

> [@ZMF Pendant - Tube Headphone Amplifier - Official Thread](https://forum.headphones.com/t/zmf-pendant-tube-headphone-amplifier-official-thread/4791/22):
>
> Speedball is the key there. Stock is a little gooey, maybe loose is a better term, depending on tubes. Just my 2¢ anyway.

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