power consumption too i guess because they use TL062 in some places
>TL062 is the low power version of the TL082. TL072 is the low noise version of the TL082. So: the TL062 uses less power, but is more noisy than the TL072.
my understanding is that the potentiometers contribute most of the noise if they aren't new/clean so it's not really worth the effort to replace them but you could replace the LM324 with TL074 if you wanted to, no?

btw i noticed the page numbers so the schematic that's posted online is missing some parts