The Fishman Full Circle is certainly earning its stripes in the Upright Bass world. The Full Circle delivers a much more natural sound than the original Fishman BP-100 pickup with a nice mix of body and string.
Installation is easy-- IF you have an adjustable bridge, since the pickup replaces one adjuster, and a matching standard adjuster replaces the other. The pickup side is a fully functioning bridge height adjustment wheel, and Fishman wisely uses a quick disconnect plug connector on the string-mounted jack so you can easily turn the wheel to adjust bridge height without removing the jack. The wheels are made of aluminum, a favorite and common choice for bridge adjuster material.
Fishman has produced an excellent installation and operations manual that even includes instructions for installing it into a solid bridge.
The pickup also offers a quick change to the response; a quarter-turn of the wheel lets you achieve an open, resonant response or a drier and more focused amplified tone.