Need recommendations for heavily a shielded sub cable

[tylerdurden]

I need some help finding a sub cable that needs to run 35+ feet, normally not a problem right? Unfortunately the cable has to run right past (2) 250 watt metal halide ballasts so the cable needs to be heavily shielded. When the lights are on they intefere with the signal come from the cable jack 4 feet away. Anyone know of an industrial strength sub cable that wont break the bank? Thanks in advance.

 

[Johnd]

Can you handle balanced xlr?

 

[tylerdurden]

Not real familar with balanced xlr but from the quick google I did it looks like that cabling is intended for use in mics. I'm guessing you would need an adapter at both ends that resembles something like these? If this is correct do you know of a place I can buy a cable at a reasonable price? Thanks again

 

[Johnd]

It's used not only in mics, but other types of professional cabling as well because of the long runs and interference they deal with. Your sub needs a balanced xlr input and your receiver a balanced xlr output for it to be a completely balanced signal. You would know if you have it (read the manuals, or look at the back of the sub and receiver). Although, I've only seen balanced xlr's on higher end equipment (you didn't state what you have).

Yes, the blue end of the connector you show is an xlr. They do offer combined xlr/rca (or even 1/4") cables, but don't waste your money. Those are made so that you make a connection: you are trying to eliminate noise/hum/interefernce. If it's not a balanced cable from connector to connector, you can still experience noise and hum. In which case you would need to introduce an audio isolation transformer. If you don't have xlr, try a good quality rg-6 cable (not rg-59), like at accessories4less, they're not that expensive. You can eliminate emi by keeping it 1'-2' away, or minimize it by crossing the lines once at 90'. Hope that helps.

 

[tylerdurden]

The equipment isn't high end, Yamaha 5890 and a 25-31 that should arrive in early April. Ideally the sub cable will run under the carpet near the base boards, problem is the 110 gallon reef tank with the ballasts sits inches away from the wall. So I can't accomplish the 1-2 foot spacing or the 90 degree cross. Emi? Not familiar with that term. Would it be possible to add extra shielding to a cable for 10-15 feet to get past the problem area?

 

[Haywood Jablomi]

Quad-shield RG-6 should do the trick. It is heavily shielded, has great noise rejection properties and is a high-quality conductor. It also happens to be cheap. Just buy a 50' spool, cut to length, add some quality terminators and you've got exactly what you need.

 

[JackDog]

Quad-shield RG-6 should do the trick. It is heavily shielded, has great noise rejection properties and is a high-quality conductor. It also happens to be cheap. Just buy a 50' spool, cut to length, add some quality terminators and you've got exactly what you need.

QuadS-RG6

I have plenty of quad shielded RG6 laying around that I could use for my sub. Can you recommend some quality RCA terminitors to use on RG6?? The sub that I am purchasing (Axiom 500) has XLR however the receiver I planned on purchasing does not.

Glad I saw this thread. I am finshing my basement and am doing theather wiring for the next week. I have been stumped on what cabling to use for the sub.

 

[jneutron]

I need some help finding a sub cable that needs to run 35+ feet, normally not a problem right? Unfortunately the cable has to run right past (2) 250 watt metal halide ballasts so the cable needs to be heavily shielded. When the lights are on they intefere with the signal come from the cable jack 4 feet away. Anyone know of an industrial strength sub cable that wont break the bank? Thanks in advance.

Try powering the sub by using an extension cord. Plug the cord back at the source component. I assume you plugged the sub in wherever it is?

Make sure the sub cable is against the extension cord, make sure the extension cord is of the twisted variety, not made with parallel wires.

This may solve the whole problem.

If it works, do not put the extension cord under a rug..this is a test only.

Cheers, John