Fishman C-100 Cello Pickup

Works a treat. You need a 'preamp' with this pick up which you can then use as feed to PA desk or main amp system
Gives good sound without any feedback.
Even when cellist plays 'quietly' you can still get good sound pick up
This might not be a super professional quality broadcast type pickup but in my view good value for money and although a delicate item if handled with usual care is suprisingly robust