Electrical interference questions for speaker cable and adjacent subwoofer power cord

All who have replied, I thank you for sharing your thoughts.  imhififan, I like the idea of shielded power cords to the sub amps if they are onboard the speakers.  Didn't realize that this was a possibility until you mentioned this.  Looking on Amazon and other vendors, it looks like these can be inexpensively obtained.  Have also noted that there are shielded subwoofer line level output cables as well that are inexpensive.

almarg, to answer your question.  I think that the following are the likely scenarios that are framing up in my mind based on the received responses:  (As background the speakers being built for me Are Ohm Acoustics F-5015s and the stereo receivers that fit my furniture under consideration are the NAD M32 and the Parasound Halo INT6.  I will likely use Blue Jean Cables for the speaker cable runs and line level output cable runs.)

Scenario 1 - a subwoofer amp onboard each main speaker:  Use a shielded power cord to the subwoofer amp.  Use a speaker cable from the stereo receiver with speaker level outputs to attach to the main driver in each speaker.  Use a line level output shielded subwoofer cable from the receiver to each subwoofer amp in the speakers.  The power cord, speaker cable and line level cable would run parallel to each other to the speakers.

Scenario 2 - a subwoofer amp outside my speakers positioned near the stereo receiver.  Small length line level connections to the subwoofer amp.  Separate speaker cable with speaker level output from the subwoofer amp to the subwoofer in each speaker.  Separate speaker cable with speaker level output from the receiver to the main drivers in each speaker.  Both speaker cables would run parallel to each other to the speakers.

almarq, thanks for the thought on the potential vibration issue for the onboard subwoofer amplifier option. I will need to ask this question of Ohm Acoustics.

roberjerman, thanks for the thought on the ease of adjusting the receiver and sub amp if they are in a similar location.  This is a definitely something to consider.

If any of you have any more feedback on this series of questions and Scenario 1 and Scenario 2, please provide your thoughts.

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?  

Well, definitely don't wrap them around each other, but normal spacing (6") should be fine.

Shielded power cords will have next to zero positive benefit and may be a negative.

Run the cables in a manner so as to cross them @ 90°.

I think the vibrations of the subwoofers in your main speaker cabinet will be a bigger issue than electrical interference from your power cables. Plus the optimal location of the subs in your room may not be the same as the optimal location for your mains which could make a bigger difference than either the electrical interference or the cabinet vibrations. 

@michiganbuckeye, after looking at the specs and descriptions of the M32 and the HINT 6 (not "INT6") I see no particular technical issues related to them that would significantly favor one of the two scenarios you cited vs. the other. So IMO the overriding consideration in choosing between those scenarios, assuming that you separate the cables by a few inches as has been suggested, is the performance of the speaker with the sub amp built in vs. not built in.  And as you indicated Ohm should be consulted on that question, especially given that the Ohm F-5015 is apparently still in beta test mode.

Also, a minor point: It would be best to refer to the M32 and HINT 6 as "integrated amplifiers." Referring to them as "receivers" might be misleading to some people.

And regarding shielded power cords, FWIW I've had fine results using Signal Cable Magic Power Digital Reference double-shielded 12 gauge power cords on two different high quality power amplifiers (a tube-based VAC Renaissance 70/70 MkIII and a solid state Pass XA25). Albeit amplifiers that are significantly less powerful than the M32 or HINT 6, and that in contrast to the M32 and HINT 6 operate in class A and hence do not draw amounts of current that fluctuate widely with the dynamics of the music. (Those power cords are ostensibly intended for use with digital components, but their gauge was/is adequate for use with my amps and I wanted the shielding they provide because they are routed near my phono stage). Of course, such things tend to be very component and system dependent, so YMMV.

Finally, if I may say so, kudos on the excellent composition of your posts and questions.

Regards,
-- Al