The ENI 3100L Power Amplifier has a flat response over the frequency range of 250 kHz to 105 MHz and a linear power output of 100 W. Amplifier gain is a nominal 55 dB. Input/output impedance of 50 ohms, VSWR input 1.5:1 max, output 2.5:1 max. Each unit has a built in meter that indicates both output RF voltage as well as power output into 50 ohms.