ruffrecords
Well-known member
It is a fact that capacitors with a large varying voltage across them will produce distortion. Steve Bench used 70V rms in his test which is about +60dBu!!!
Steve Bench's tests were conducted with 0.1uF capacitors. When a properly sized capacitor is used as a coupling between circuits, the voltage across it is miniscule. A typical 47uF coupling capacitor in a 10K circuit will have a voltage across it easily more than 120dB lower than this.
On the other hand, in an EQ, there are significant voltages across capacitors so non-linearities are more likely to be detectable.
Cheers
Ian
Steve Bench's tests were conducted with 0.1uF capacitors. When a properly sized capacitor is used as a coupling between circuits, the voltage across it is miniscule. A typical 47uF coupling capacitor in a 10K circuit will have a voltage across it easily more than 120dB lower than this.
On the other hand, in an EQ, there are significant voltages across capacitors so non-linearities are more likely to be detectable.
Cheers
Ian
