The AA-20520M-400 from Advanced Amplifiers is a RF Amplifier with Frequency 0.02 to 0.52 GHz, Gain 56 dB, Power Gain 56 dB, Gain Flatness 3 dB, Output Power 400 to 500 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for AA-20520M-400 can be seen below.