MRC01
Major Contributor
The take-away is simple: use 20*log(R) for most of the specs that Amir publishes for DACs & preamps (SINAD, THD, IMD, etc.). Every factor of 10 is 20 dB, e.g. -40 dB is 1% or 100:1.
Exception: when measuring power output use 10*log(R).
This is important to note cuz some people might look up the standard dB formula, see 10*log(R) and use this for the DAC/preamp specs which would be incorrect.
Exception: when measuring power output use 10*log(R).
This is important to note cuz some people might look up the standard dB formula, see 10*log(R) and use this for the DAC/preamp specs which would be incorrect.