Quote: Originally Posted by
NapalmV5 
i can safely say that 40% wav/mas = higher db than @ 100% wav/mas stock caps
What type of load are you driving? Headphones or is this going into an amp? If it's driving headphones I might understand this possible rise in output since it is a harder load to drive vs an amp that has a typical 10Kohm input impedance. The PSU voltage does not change so really you are still capped by the PSU rail voltages going to the opamps in the buffer circuit.
RE picking opamps:
http://www.dself.dsl.pipex.com/ampins/webbop/opamp.htm