SMSL SA-S3 TA2021B High-grade HIFI Digital Amplifier + 14V3A Power Adapter - Black SMSL SA-S3 offers 25W per channel (13.5W @ 8 Ohms) Impressive sound quality, musicality from 100 dB dynamic range Gold-plated RCA input jacks and binding posts deliver full sound Upgraded model (as of 11) features new Audio Technology: Tri-Path T-Amp features TA2021B chip in the IC Circuit