Released in the Model 88, the PTS (“Perfect Triode Simulator”) uses the revolutionary idea of emulating an ideal audio tube. All the magic of the 300B, the dynamics of the 845, the transparency of the 2A3 and the perfect timbre of the 45 - all united in one single device never before produced. How to take this concept to the solid state camp? The answer for this chalenge is the FITS "Fet Ideal Triode Simulator" - the solid state version of the PTS used in the Model 55 and Model 35.