AnalogSteph
Major Contributor
What balanced power does is:
1. It eliminates common-mode E field radition from the mains. I imagine recording electric guitar would benefit from this if nothing else (high impedance circuitry where shielding is not always all that great - even if the cable is alright that doesn't mean the instrument itself is).
2. It reduces voltages to ground. That's why it's used on ships.
3. It eliminates power supply leakage currents from IEC Class II devices with SMPS mains filter topologies originally derived from Class I jobs (i.e. L and N capacitively coupled to secondary-side ground only as the PE connection got axed).
If this makes such a major difference in studios even outside item #1, I do have to wonder how many devices with AES48-2005 compliance issues are still out there in this day and age. They no doubt would still have been very common when RaneNote 151 was written in 1995. Otherwise I don't think there would normally be long runs of signal wires right next to mains wiring that could push CMRR limits in the face of item #1 - right? (This may not even be up to code depending on where you live.)
1. It eliminates common-mode E field radition from the mains. I imagine recording electric guitar would benefit from this if nothing else (high impedance circuitry where shielding is not always all that great - even if the cable is alright that doesn't mean the instrument itself is).
2. It reduces voltages to ground. That's why it's used on ships.
3. It eliminates power supply leakage currents from IEC Class II devices with SMPS mains filter topologies originally derived from Class I jobs (i.e. L and N capacitively coupled to secondary-side ground only as the PE connection got axed).
If this makes such a major difference in studios even outside item #1, I do have to wonder how many devices with AES48-2005 compliance issues are still out there in this day and age. They no doubt would still have been very common when RaneNote 151 was written in 1995. Otherwise I don't think there would normally be long runs of signal wires right next to mains wiring that could push CMRR limits in the face of item #1 - right? (This may not even be up to code depending on where you live.)