Tda2030A is a single chip power amplifier.It's designed for home use.It has medium music power 18W continuous and it's a good quality 35W driver.This IC(integrated circuit) can deliver on 4 ohms 20 Watts and on 2 ohms 25 Watts.This IC is not a high end IC and doesn't support 1 ohm.Power needed is max. DC30V.It's able to deliver 40 Watts in bridge application,drived on +-15V.It needs an enough large heatsink because it produces many heat.This circuit is not suitable for begginers.For beginners most suitable is the low voltage low power IC,theTDA2822M.This IC can be used as preamplifier to TDA2030A.This 2 IC's are low cost but good quality circuits.This 2 IC's are used in TV,radio,casette recorder and other applications.