My 2019 Update Thread - My final system I think.

[struth]

It's only the system gain structure Grant IMO, as long as you can get the sound level you need it's good.

Changed a pot for a stepped attenuator in a high end preamp and the same happened, had to rotate the volume knob more for the same volume level.

its a Burr-Brown analog PGA2310 volume control chip. he PGA2310 possesses two main components; a set of resistor networks and an op-amp output stage. (An op-amp output stage? We’ll come to that.) The resistor network allows for an amazing 0.5db steps of fine control with channel matching within 0.05%. Compare that to conventional motorized volume controls which can only match channels to 7-10%.

Burson’s secret sauce is setting the PGA2310’s op-amp output stage to unity gain so it essentially acts as a purely resistive volume control. This arrangement avoids any coloration the op-amp output stage may inject into the audio signal.