This document provides user guidelines for the evaluation board DEMOTS488/9, which is designed to evaluate the TS488 or TS489 low power stereo headphone amplifier. The TS488/9 is an enhancement of TS486/487 and eliminates pop & click noise. It is a dual audio power amplifier capable of driving a 16Ω or 32Ω stereo headset in single-ended mode. It can deliver up to 31mW per channel (into 16Ω loads) of continuous average power with 0.1% THD+N in the audio bandwidth from a 2.5V power supply. The TS488/9 features externally-controlled standby mode, low current consumption, high signal-to-noise ratio, high crosstalk immunity, and high PSRR.