How to Remove an Audio Device

I installed 'Boom' on my 11" MBA to increase the volume on low level sources. It worked, but used an unacceptably large amount of CPU. I uninstalled it in the usual way, however I am left with an audio device called 'Boomdevice' (visible in the Audio MIDI setup utility). This doesn't seem to be affecting anything, but I would like to get rid of it. Does anyone know how?

Thank you.
Has invited:

howapple - hello

Favor from:

it places a kernel extension & audio plugins, so easiest/quickest is to replace the app then use Boom-Preferences-Uninstall

if you're digging:

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