Adding two JL Audio F110's to my 2 channel system

The balanced input connectors on the F110, at least on the v2 version, are combo connectors that can accept either XLR’s or 1/4 inch TRS plugs.  So as Rhyno stated a cable having XLR’s at both ends will work.

However, I’d suggest checking with BAT and asking them what the output impedance is of the pre-outs of your amp, **especially at 20 Hz.**  The output impedance of at least some of their preamplifiers rises substantially in the bottom octave, reaching several thousand ohms at 20 Hz, due to the specific values of the output coupling capacitors used in those designs (the impedance of a capacitor rises as frequency decreases).  If the pre-outs of your amp are similar in that respect, given that the balanced inputs of the F110v2 have an input impedance of only 10K perceptible rolloff of the deep bass content of the signals received by the subs would result.

Good luck.  Regards,
-- Al
 

Freddy, I also have 2 JL f110's.  They put a solid floor under my Wilsons Sophia 3's.  I'd also like to go the JL crossover route as James suggests, but it's not cheap and will to wait for now.  Until then, here's your confusion; the Neutrik connections on the subs double as balanced XLR connections.  I run balanced out from my McIntosh pre amp, left and right channels into the subs.  I used a test tone disc, a sound pressure meter and the subs own room correction to dial them in.  Although not as good or precise as the JL active crossover, it will get you close.  You're going to be very happy with these two subs. Good luck and let me know if I can be of more help.
Mark

James633,
The Jl audio e-112 comes equipped with its own active high pass crossover.  Here is a quote from their website "The E-Sub’s active crossover is a true two-way, 4th order Linkwitz-Riley design, with a low-pass filter feeding the subwoofer's amplifier and a high-pass filtered signal exiting its line outputs."
Ernie

Thank you all for your comments.  Somehow I feel better.  Yes, I'm afraid the only way to get close to holy grail sound is with JL audio's own expensive crossover unit.  Unfortunately, I don't think this crossover can be used with my BAT vk300x.  I think I have some ideas of my next upgrade.

 Thanks everyone again!

F