Using some very long balanced Subwoofer cables.


I now own 4 JL Audio F-113 subs and would like to run the front 2 as Master (s) and the rear 2 as Slave units. This would mean that each rear sub would have 75 feet of a balanced XLR cable running to them. The front has about 15 feet to each sub.
This seems to me to be too much cable. Is this too much cable?
And no, I will not be using SR cables just Monoprice to the rear subs.

ozzy
128x128ozzy
tgrisham, millercarbon, almarg,

Thank you for the response.

So, will that long of wire be a problem for my preamp / amp (Ayre KX-5 twenty)? Possibly because of the more capacitance from the additional cable?

I’m thinking no because the long interconnects will actually be connected to the JL sub slave output and is not directly connected to the Ayre.

But then again...?

ozzy
I’m thinking no because the long interconnects will actually be connected to the JL sub slave output and is not directly connected to the Ayre.

Excellent! The sub’s manual makes clear that the balanced pair of signals provided to its "output to slave" connector is buffered within the sub, meaning that the cable connected to that output will be driven by an output stage within the sub and won’t be driven by the Ayre. And that is further confirmed by statements indicating that whatever signal processing is being performed by the sub is reflected in that output. So the concern I cited in my previous post doesn’t apply.

Best regards,
-- Al


Thanks Al,
In addition, the 75 cables are; " the Monoprice Premier Series XLR Male to XLR Female - 75ft - Black - Gold Plated | 16AWG Copper Wire".

So, I'm thinking with 16 gauge wire there will be minimal signal loss.

ozzy
Hi Ozzy,

16 gauge is more than adequate. In fact even 24 gauge, which is sometimes used in XLR cables, would be fine (although I suppose the presumably greater physical fragility of the narrower gauge could conceivably be an issue in your application).

The input impedance of the balanced input of the slave subs is 10K. The combined resistance of the two 75 foot signal conductors in the 16 gauge cable will be 0.6 ohms, which will result in a loss of 0.6/(10,000 + 0.6) = 0.006% of the signal voltage. Which is a loss of about 0.0005 db :-)

Best regards,
-- Al

Al,
Thanks,
Only one 75 foot cable will be used on each master to slave unit.
I should have them soon to try.

ozzy