AMP2X15 Audio Amplifier Board PUI Audio AMP2X15 Audio Amplifier Board offers Audiophile-grade sound quality with a wide +9.5VDC to +20VDC input range. The board features a Texas Instruments' TPA3110D2 Class D amplifier circuit for maximum signal fidelity. The AMP2X15 delivers 6W per channel of low-distortion power (0.1% THD+N) into 4Ω loads and 15W per channel into 8Ω loads (10% THD+N with 16VDC supply). The board offers single-ended and differential inputs with stereo BTL or mono PBTL outputs. This allows it to be used in prototyping audio solutions for a variety of applications.