Proton 6

Proton 1100 Control amplifiers €451 median Proton 2 Power amplifiers €138 median Proton 222 Power amplifiers €40 median Proton 4 Power amplifiers €37 median Proton 400 Control amplifiers €194 median Proton 450 Power amplifiers Proton 5 Power amplifiers €56 median Proton 520 Integrated amplifiers €92 median Proton 520-B Integrated amplifiers €110 median Proton 550 Integrated amplifiers Proton 900 Control amplifiers Proton AA-1150 Control amplifiers €547 median