Does anyone know where I might get a PCB for something like the following circuit?
This is just the usual power buffer but with a proper heat sink it could probably put 5W into an 8R load. This might be used to drive a speaker, headphones, a reverb tank, etc. And there's no reason why it couldn't be used as just an overpowered line driver. The extra BD139/BD140 transistors are probably < $1 and they improve the headroom anyway.
Alternatively, if I were to have a board made, would you change the circuit in some way?
This is just the usual power buffer but with a proper heat sink it could probably put 5W into an 8R load. This might be used to drive a speaker, headphones, a reverb tank, etc. And there's no reason why it couldn't be used as just an overpowered line driver. The extra BD139/BD140 transistors are probably < $1 and they improve the headroom anyway.
Alternatively, if I were to have a board made, would you change the circuit in some way?