The AT8031 is a 2.1 Channel Class-D output audio power amplifier for driving speakers with high power efficiency. The bass & right & left channels is designed as BTL (BridgeTied-Load) for high output power. The output power can be up to 20W for bass and 10W for either Right or Left channel. The AT8031 offers the feature of parallel BTL operation with two outputs of right & left channel connected directly. The AMP is a 2.0 Channel audio power amplifier. No external heat-sink is necessary. Power supply range is 5.0V to 16V.