This stereo amplifier uses a low cost, and widely available audio IC. The TDA2822M from ST Microelectronics. With the addition of a few passive components it is possible to build a low cost stereo amplifier featuring a good impulse response, ideally suited for connection to a PC soundcard.Looking at today’s compact active loudspeaker systems for PC’s you can only marvel at the quoted power output that such small units can produce. A closer inspection reveals that the power quoted is not the generally accepted and well defined continuous power rating of the amplifier but rather its Peak Music Power Output (P.M.P.O.). This rating gives an indication more of the ability of an amplifier to reproduce impulses rather than its continuous output power rating.