I have made a small 7w mono amp using a TDA2003 audio amplifer IC, it work really well, however i wanted to make it stereo so i made another one (same circuit). but when i linked the two it makes a nasty noise and it draws more and more current. i have linked it by conecting all grounds and power supply, i have linked the audio in and outs to the seperate amps. should i be linking the audio and power ground seperatly or using caps in powers lines. I can work it out can any one help ??