Understanding specs like capacitance for RCA interconnectors like for subwoofer cables. Help please.

[GabrielPhoto]

Hi!
So I need a 25 feet cable and was looking at this Onix

https://www.monoprice.com/product?p_id=21679

Features:

• Gold plated RCA male connectors
• 97% pure oxygen-free copper conductor
• Double shielded with copper braiding
• 22 pF per foot capacitance
• 75 ohm impedance

Is that considered good capacitance for a subwoofer cable of that lenght, or does it even matter?
Any other spec that is relevant?
How about for shorter runs like 3 to 6 feet?

Thanks

 

[Ricardus]

It doesn't matter. If you need an unbalanced 25 ft. cable for your sub then that one is fine.

 

[DVDdoug]

As long as it's shielded and not defective, your choice of cable won't make any difference.

Line level outputs are low impedance which means they are highly immune to capacitance. (Phono cartridges and guitar pickups are higher impedance and they can be sensitive to cable capacitance.)

Capacitive reactance is inversely proportional to frequency which means if the capacitance becomes large enough to effect the sound, it affects the high frequencies first... Subwoofer connections are even more immune to it.

The 75 Ohm impedance rating doesn't apply at audio frequencies.

 

[GabrielPhoto]

As long as it's shielded and not defective, your choice of cable won't make any difference.

Line level outputs are low impedance which means they are highly immune to capacitance. (Phono cartridges and guitar pickups are higher impedance and they can be sensitive to cable capacitance.)

Capacitive reactance is inversely proportional to frequency which means if the capacitance becomes large enough to effect the sound, it affects the high frequencies first... Subwoofer connections are even more immune to it.

The 75 Ohm impedance rating doesn't apply at audio frequencies.

So based on the replies here, this may be just as good but cheaper?

Amazon.com

Thanks

 

[solderdude]

So based on the replies here, this may be just as good but cheaper?

Amazon.com

Thanks

Yes.

 

[egellings]

It doesn't matter. If you need an unbalanced 25 ft. cable for your sub then that one is fine.

Agree. Fancy cabling is not necessary for that application.