Jafant
Well, I "hear" that response but it does not compute in my system. Interconnect and speaker cable sure do, though, as I hear those changes. Not so power cords.
Here is my take on why. The manufacturer of components KNOWS what criminal intent is coming down the power line, and compensates for it in the power supply. DC is DC. It has no sound. They use RF simulations and voltage spikes to design accordingly. Call your favorite builder and tell him his power supply is no good because of a cord!
I've read all the theory, and have NEVER seen the improvement shown as DC Vcc bias level shifts in the audio output, ever. Remember the Vcc DC bias shift has to be long enough in duration to HEAR, too. Ears are better INTEGRATORS verses pole (spike) detectors. We mostly ignore surface noise on records all day, for example. Yet, a big SPIKE or POP (I rate them snap, crackle then POPS!)is required to really shiuft your attention off the music. Does the Vcc bias drift change THAT much? And, "something" outside of the normal AC power coming in the wall has to do it. I never hear it in my system.
So, show me the DC Vcc bias drift over time feeding the AC amplification circuits and we'll talk. THEN, we need to talk about the AMOUNT of DC bias drift that would even be audible in the AC amplification gain stages. Fix it if it's broken. I challenge any AC to get past 140,000 uf of filter capacitors in a good power supply.
Not so the effects of the interconnects. They use ”standard" output impedance (mostly) and input impedance (mostly). But, the length of the cord and / or the type is NOT ever going to be consistent. So, we hear changes that cannot be accounted for ahead of time. That's not the case with a power supply. All interconnect and speaker cords have differing inductance, capacitance and resistance. Worse, the same cord is different based on it's length and output / input relationship.
So I don't have to "figure" this out. I do not hear it. I use 12 AWG power cords that are well in excess of what the wall outlet will EVER deliver to any one component in the circuit. The power supply is what turns the AC to DC, not the power cord. A simple capacitor or diode knows more about AC rectification than any power cord ever will.
Point to consider, how is that ALL power supplies need a cord? Are they "all" incompetent, really? Or do we just stick one in there anyway because we can?
Well, I "hear" that response but it does not compute in my system. Interconnect and speaker cable sure do, though, as I hear those changes. Not so power cords.
Here is my take on why. The manufacturer of components KNOWS what criminal intent is coming down the power line, and compensates for it in the power supply. DC is DC. It has no sound. They use RF simulations and voltage spikes to design accordingly. Call your favorite builder and tell him his power supply is no good because of a cord!
I've read all the theory, and have NEVER seen the improvement shown as DC Vcc bias level shifts in the audio output, ever. Remember the Vcc DC bias shift has to be long enough in duration to HEAR, too. Ears are better INTEGRATORS verses pole (spike) detectors. We mostly ignore surface noise on records all day, for example. Yet, a big SPIKE or POP (I rate them snap, crackle then POPS!)is required to really shiuft your attention off the music. Does the Vcc bias drift change THAT much? And, "something" outside of the normal AC power coming in the wall has to do it. I never hear it in my system.
So, show me the DC Vcc bias drift over time feeding the AC amplification circuits and we'll talk. THEN, we need to talk about the AMOUNT of DC bias drift that would even be audible in the AC amplification gain stages. Fix it if it's broken. I challenge any AC to get past 140,000 uf of filter capacitors in a good power supply.
Not so the effects of the interconnects. They use ”standard" output impedance (mostly) and input impedance (mostly). But, the length of the cord and / or the type is NOT ever going to be consistent. So, we hear changes that cannot be accounted for ahead of time. That's not the case with a power supply. All interconnect and speaker cords have differing inductance, capacitance and resistance. Worse, the same cord is different based on it's length and output / input relationship.
So I don't have to "figure" this out. I do not hear it. I use 12 AWG power cords that are well in excess of what the wall outlet will EVER deliver to any one component in the circuit. The power supply is what turns the AC to DC, not the power cord. A simple capacitor or diode knows more about AC rectification than any power cord ever will.
Point to consider, how is that ALL power supplies need a cord? Are they "all" incompetent, really? Or do we just stick one in there anyway because we can?