Radial Engineering TWIN SERVO 500 Series Jensen Mic PreampThe Radial Engineering Jensen Twin Servo 500 Series Mic Preamp is a faithful recreation of Deane Jensen's original Twin Servo 990 mic pre, regarded by many audio professionals as one of the finest preamps ever made. This mic preamp has pedigree. The circuit designed by the Jensen engineering team includes two cascaded 990 op amps to share the load and provide 60 dB of clean gain. The two servos eliminate the need for signal degrading capacitors in the