If you have a powered sub with speaker level inputs, this DIY hack is a quick and easy way to add any subwoofer to your Sonos speakers by grabbing the speaker output from IKEA Symfonisk speakers and adding it into the sub’s speaker inputs. I ran some tests and this works great. If you have a sub with speaker outputs, you could wire this a bit differently and remove the bass from your Sonos speakers so they don’t have to work as hard. I tested 2 ways to add a Powered sub to my Sonos home theater and found a super cheap way to get a full 5.1 system for under $700 - that’s the same price as the Sonos sub alone! Recommended subwoofers on Amazon ~$100: Polk 10" - https://amzn.to/2RcWV1q Monoprice 8" - https://amzn.to/3696umd Monoprice premium 8" - https://amzn.to/2Rdl73O Acoustic Audio 8" - https://amzn.to/2TVfCZt Note: any subwoofer will work as long as it's amplified and has speaker level inputs - if it only has RCA inputs, look elsewhere. This same idea could work with any Sonos model: Play:1, Play:3, Play:5, Playbar, etc. if your willing to drill into your speaker. This $99 speaker is much cheaper than buying a connect or amp. Buy Ikea Symfonisk here https://www.ikea.com/us/en/p/symfonisk-wifi-bookshelf-speaker-black-00357561/ See my Symfonisk teardown to see how to take it apart: https://www.youtube.com/watch?v=jVHOgz3-Z-k How to add a sub to a home theater setup: https://www.youtube.com/watch?v=ki3n98U_I7Q