THe Micrivox 400 micriophone is about the size of a sugar cube and is attached to the instrument via a sticky backed velcro patch. As far as I can tell there's no damage as such to the instrument finish (assuming it's cellulose) and I would guess that if you need to remove the patch, any adhesive residue left on the instrument could be removed using a cloth damped with white spirit. If the instrument lives outside its case and gets exposed to daylight there might be a "shadow" of lighter wood in the shaded area left beneath the velcro patch when fianlly removed. If there's a scratchplate on your cittern, try sticking the velcro to that - the 400's a mike, not a transducer, so the sound quality wouldn't be impaired as it might be with a transducer.


I also use a 400 for my tenor banjo - it sits on the perch pole under the bridge.

Good luck