Repost from nearly identical thread in the Jango forum:
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I took mine apart, replaced the battery connection to run off a 9V battery, and i stuck all the guts in the helmet. I extended the wires for the speaker itself and used a small plug so I could disconnect it easily. The speaker will either go under my chest/ab armour, or possibly in my neck seal.
Here it is minus the 9V battery connector.
I'll have pics of it in my helmet soon.