An AC power cord, running close and parallel to any other conductor, will induce a current/EMF in(will affect, via it’s magnetic field) that conductor, per Faraday’s Law. Whether the effect/result would be audible, given there’s no amplification at the receiving end of a passive speaker system’s cable, is questionable(personally; I’d say doubtful). ie: https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-flux-faradays-law/a/what-is-faradays-law and: https://courses.lumenlearning.com/physics/chapter/22-10-magnetic-force-between-two-parallel-conductors/ Still; there’s a signal, that you don’t want affected, traveling those speaker cables. If faced with the scenario; I’d be inclined to avoid any possibilities, using the Inverse Square Law(as Elizabeth prescribed / in my opinion: a 3" minimum). ie: https://www.khanacademy.org/science/electrical-engineering/ee-electrostatics/ee-electric-force-and-electric-field/a/ee-inverse-square-law Far as conduit; I tend to avoid ferrous metals, around my audio equipment/cables, as much as possible(just my own practice). Aluminum conduit wouldn’t effectively diminish/redirect a magnetic field.
Electrical interference questions for speaker cable and adjacent subwoofer power cord
AudiogoN Team,
I am getting a set of speakers with built in powered subwoofers. If the subwoofer amps are onboard the speakers, I need to run the power cords for the subwoofer amps with a routing that is parallel to and adjacent to the speaker cables for the mains and subwoofer. (I plan on using a surge protector for all the electronics, so the subwoofer power cords would have a similar routing as the speaker cables from near my receiver to the speakers.)
1) Do I need to worry about electrical interference from the powered subwoofer power cords running to the sub amps in the speakers if the speaker cables are parallel to and in proximity to the power cords?
2) If interference is an issue, how far apart do they need to be spaced to avoid interference ( a) power cord from speaker cables, b) subwoofer speaker cable from main driver speaker cable)?
3) if interference is an issue, is there a type of speaker cable that I should get that minimizes the interference and enable close placement of the speaker cable to the subwoofer power cord?
4) if interference is an issue and I ran either the power cords or the speaker cables through a metal pipe, would this eliminate the interference and allow the speaker cables and the power cords to be close to each other? Only one type would be placed in the metal pipe.
5) For these custom built speakers, I may have a choice to have a) the subwoofer amps onboard the speakers or b) a single subwoofer amp not in the speakers that would instead be located by my receiver, which would then have its own speaker cable that would run to the subwoofers onboard the speakers. Since this may be a scenario, is it better to have the subwoofer amp onboard the speakers or off of the speakers?
Thanks in advance for your guidance.
I am getting a set of speakers with built in powered subwoofers. If the subwoofer amps are onboard the speakers, I need to run the power cords for the subwoofer amps with a routing that is parallel to and adjacent to the speaker cables for the mains and subwoofer. (I plan on using a surge protector for all the electronics, so the subwoofer power cords would have a similar routing as the speaker cables from near my receiver to the speakers.)
1) Do I need to worry about electrical interference from the powered subwoofer power cords running to the sub amps in the speakers if the speaker cables are parallel to and in proximity to the power cords?
2) If interference is an issue, how far apart do they need to be spaced to avoid interference ( a) power cord from speaker cables, b) subwoofer speaker cable from main driver speaker cable)?
3) if interference is an issue, is there a type of speaker cable that I should get that minimizes the interference and enable close placement of the speaker cable to the subwoofer power cord?
4) if interference is an issue and I ran either the power cords or the speaker cables through a metal pipe, would this eliminate the interference and allow the speaker cables and the power cords to be close to each other? Only one type would be placed in the metal pipe.
5) For these custom built speakers, I may have a choice to have a) the subwoofer amps onboard the speakers or b) a single subwoofer amp not in the speakers that would instead be located by my receiver, which would then have its own speaker cable that would run to the subwoofers onboard the speakers. Since this may be a scenario, is it better to have the subwoofer amp onboard the speakers or off of the speakers?
Thanks in advance for your guidance.