1. Introduce SL-A09S is the new class D High End design, it is new product of digital amplifier board,use SMT decal of main IC,connection is very simple.High Power efficiency,Less heat.High Performance with heatsink. 2. Application • Power speaker • Digital product • Computer and laptop • Portable product • Wireless product • TV, DVD and the other product　 3. Feature • 2*25W output power in stereo mode(8Ω THD=10%) • High efficiency: Up to 90% • Filterless class D amplifier • Programmable gain(+22dB, +29.5dB, +36dB) • High PSRR(90dB at 1KHz) • Shutdown and mute control • Integrated click-and-pop suppression • Low 0.2% THD+N • Current limit and thermal protection • Available in thermally efficient, space-saving package: 56 pin TQFN • The dimension is only 72mm*48mm