This circuit (largely due to the op-amps) draws 8 to 10 mA, making V+ between 14 V and 17 V, which is plenty for a low level circuit. I have not checked the optimization of the response-shaping feedback network. It interleaves pole and zero frequencies to approximate the -3 dB per octave rolloff of pink noise (if you'd like that optimized for accuracy, my services are available for a fee ). The output is BALANCED in the only way that matters (equal impedances with respect to ground) although only one pin has signal. I'll not beat that horse again!