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How To Properly Bi-Amp (Sonic Frontiers Line 2 to Two Amps to power Infinity Kappa 9's)

I recently purchased a pair of pristine Infinity Kappa 9's and I am looking to biamp them. I have a pair of Kappa 7's that are using a Behringer Europower EP4000 amp and it works great.  The Ep4000 cannot handle the 9's.

I am confused as to how to split the signal coming from my preamp for proper bi-amping. Do I just buy a split balanced or RCA cable? I feel like this would compromise the signal... Or do I use the additional outs on my preamp? My preamp is a Sonic Frontiers Line 2. I believe it has two stereo XLR outs and two RCA outs.

Please let me know.

...also, what is an powerful enough, extremely holographic, silky sweet amp for the mids and top section of the Kappa 9's? Suggestions would be greatly appreciated.

Thanks,
Brett
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cleeds
5,653 posts
 
brettmcee
I am confused as to how to split the signal coming from my preamp for proper bi-amping.
You need a crossover between your preamp and amplifiers to biamp properly. There are many to choose from ... Bryston, Marchand, Pass, Behringer ...
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brettmcee OP
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Thanks for your reply.  The Infinity Kappas already have a crossover setup specifically for bi-amping. I do not think I need an additional external crossover, although it would increase the efficiency in amplification. 
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brettmcee OP
218 posts
 
One of the Crown XLS amps I am using has an internal crossover and I will employ it.

Still, how would one split an output signal from the preamp to feed the two amps? Should I just use the multiple outs from the preamp?
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cleeds
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brettmcee
Still, how would one split an output signal from the preamp to feed the two amps? Should I just use the multiple outs from the preamp?
To take advantage of biamplification, you really need an xover between your preamp and amplifiers. That will not only allow you to set the xover frequency, but will allow you to adjust for differences in gain between the two amplifiers.
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