If you want your audience to hear all the tonal nuances of your bass, the Schertler DYN-B electrodynamic bass transducer is your best choice! Like having a studio quality microphone following you around! Great tone, strong signal, perfect accuracy - you'll never use a piezo pickup again! Installs on the back with high-tech putty, removed easily. It installs and removes quickly, and is even safe on old Italian varnish. Safe enough for Rostropovich to put on his Strad cello!
The transducer has a short wire that ends in a 3 pin connector held between the strings in front of the tailpiece. An 88" cable plugs into the connector and ends in a standard XLR mic jack. No phantom power is required.
NOTE: Do not thump the piston of the transducer to see if it works - it is very sensitive and can be damaged. (The sensitivity is why it sounds so good!)