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