Buy on Amazon.com : http://amzn.to/1xAYpPv<br /><br />Signstek SA-36A Pro Upgrade Version 20W*2 TA2020 Class HIFI Digital T AMP Stereo Amplifier<br /><br />Has a real 20w2 stereo design of the circuit <br />Real fever and all original manufacturing <br />Advanced aluminum shell and oxidation process <br />Built-in speaker protection and time-delay circuit to prevent rushing sound producing so that to protect your loudspeaker <br />Adopts advanced chip TPA3118
