New vehicle part:  Stereo!  (WIP, help needed)

Adding vehicle-mounted stereo systems, so you can buff your morale on the go!  Or just blare music and annoy your (now undead) neighbors.  I'm not really sure what I'm doing, this is a completely new type of project for me.

So far, my thoughts are when this is on, it generates noise (obviously) and creates a morale-boosting aura near it.  I'm not sure if this aura should just be focused on the stereo itself (like a kitchen unit), or if I should add separate speaker parts (that require a stereo to function, and radiate sound from wherever they're located)  Also debating if this should have volume controls, higher volume draws more power, but transmits the morale bonus (and monster attracting noise) further away.

I'm definitely going to need help on this one, so please comment your suggestions!  I think it would be a major boost to the vehicle systems realism to have stereos.