TS4871, low voltage audio power amplifier Evaluation Board. DEMO TS4871 is an evaluation board designed for the TS4871 low power audio amplifier. The micro package DFN8 (dual flat non leaded 8 pins) allows space saving and good thermal dissipation. The BTL gain is set at 2V/V and can be adapted if necessary with a modification of R1 or R2 values