I have never seen a power audio amplifier that needs a regulated dual-polarity supply. They use a center-tapped transformer, bridge rectifier and two big filter capacitors.
If you build two of this project and power them from a center-tapped transformer, joining the projects at the tap then I think the negative supply in each project will not work properly.
When you make two completely separate supplies, one can be 0V to +30V and the other can be 0V to -30V. If one or both outputs are shorted to 0v then that supply will safely regulate its output current to the amount of current that is set at.
The supplies have no protection from an output voltage or current of the wrong polarity so if +30V is shorted to -30V then one or both supplies might blow up.
Ops, sorry, I was thinking in another piece at the time.
Not even farnell have this one in DIP socket here.
I will have to find something similar to this.
Would NE5532 work in this circuit? I have no LME2141 in my country.The LME2141 is not available anywhere because nobody makes it. You have the wrong letters.