Originally Posted by mrmikemrmike
I'm not personally set up this way so no dog in the hunt but a statement like this should include the why explanation. It would satisfy curiosity if nothing else and take it out out of the magic, because realm.
Les and fastl, the explanation with regards to AC Impedance and Fidelity was previously stated in the thread. You must have missed it. I felt no need to reiterate the statement. If you do not believe AC Impedance is an issue, try comparing 18AWG cord set with a 14AWG or a 12AWG on an amplifier. Or plugging an amp into a 100 ft. extension cord. I think the effect will prove the point as you turn up the volume on the system and listen for two to three minutes.
Additional side note: Do not use a Voltage Regulator in tandem with a UPS at point of use/end of the line. (The caveat to this would be a large service entry type UPS e.g 20kVA and a Voltage Regulator at the point of use on one of the 20kVA branch circuits.) Many AC regulators and UPS units are designed in particular different ways. UPS units are designed from the standpoint of the needs of the equipment and Voltage Regulators are design as an extension of the electrical circuit. Hence you will often find 15A, 20A and 30A regulators in 120V regions and 6A, 10A, 16A and 32A regulators in 230V/240V regions; and UPS units in a variety VA ratings, 350VA, 500VA, 1kVA, 1.5kVA, 2.2kVA, etc., etc. Because of this reality, the internal AC wiring buss and matching components of a UPS and a Regulator often will not match, possibly causing a host of issues for the power management equipment and/or the A/V equipment which is powered.[/QUOTE]
What prompted the need to answer a post from 2 and a half years ago? I wouldn't have even noticed this if the forum software didn't notify me.
I went back and reread the thread from post 1. All I still see for an explanation pretty much boils down to because.
As to the light gauge extension cord the biggest issue I see is voltage drop due to the resistance, not impedance, which would result in effectively giving the amp a brown out. Not good for the continued health of the power supply.
Now if you left that 100 ft of cable on the cord reel creating an air core inductor there would be impedance effects galore. Not going to try this at home either.