THIS NEW Amplifier from TRIAD Audio takes the Legendary LISA III circuit and Packages it into a smaller more Versatile Amp. First, we replaced the ¼” Headphone jack with a 1/8” Stereo Mini jack to use IEM type Headphones. In addition, another 1/8” Mini jack Input located next to the headphone Output and connected to the rear mounted RCA Inputs. Also located upon the rear is a gain switch to accommodate high sensitivity IEM Type Headphones. A DC Coaxial power connector to allow operation and battery recharging from the AC power also provided.