Touch the logo and the F159 reveals Fosgate’s signature beneath the 6922 tube glow while looking through the window to Jim’s circuit. The Cascode circuit will produce a natural and organic sound with accurate pace and three dimensionality. To top it off, the Calibration and Activation of the CrossTalk Reduction Circuit defines all frequencies, focuses the image in the soundstage by increasing channel separation, and automatically corrects azimuth which returns off balanced sound-stages to their rightful place. F159 Cascode circuit 2 6922 tubes and dual MosFets Touch sensor Glass Carbon fiber Low impedance 40-60 dB gains Elegant Cool Fosgate Foz signature Crosstalk reduction