Mod gives Google's Home Mini speaker its 'missing' line-out jack

For many, Google's Home Mini speaker has one key disadvantage over Amazon's Echo Dot: there's no line-out jack. If you want more powerful sound without buying a higher-priced model, you have to stream to a Chromecast-equipped speaker system. However, that didn't deter SnekTek -- the site has added an aux audio port to the Mini through a clever homebrew mod. To say this required some delicate surgery would be an understatement, mind you. The procedure involved boiling the adhesive off the bottom, finding the one space where a headphone port would fit, and carving out a hole. As with the iPhone 7 headphone mod, the product clearly wasn't designed for this -- there won't be any doubt that you voided your warranty once you're done.

https://www.engadget.com/2017/12/11/mod-gives-googles-home-mini-speaker-its-missing-line-out-jack/