Virtual PulseAudio device that will run all my speakers simultaneously doesn't work. 🦠

So, I have a cast off Samsung soundbar & sub that I'm pretty sure I'm killing the little speakers in trying to accomplish the volume necessary for Holotrophic therapy (which includes going voluntarily deaf by listening to music so loud that you can't hear anything else). I was playing around with PulseAudio after finding pavucontrol could control my volume, but not alsamixer. In the config I see the attached statement that it can create a virtual device that will drive the speakers on my desk & in my monitor as well. That could likely get me to where I'm looking to be. 💒🛹📢🌚🎆🌝💸🦋🐙😹🎱🎳👑 In the Pulse volume control, when I select “Virtual Streams”, there are no entries. There's only “System Sounds” which have no effect on SoundCloud.