Speakers after Infinity Kappa 9

I had Kappa 9 (original version) Kappa 8.1 and the Polk SDA-SRS all at the same time. The Kappa 9 was the best with airy high and nice clear mid but no bass at all (I used 4 Denon POA-6600 mono blocks for them). The Polks got tons of bass but it was so muddy and mid and highs were no where near as good as the 9s. These were bought just to scratch the itch that I have ever since I heard them when I was a college student. They are all gone now replaced by a pair of Von Schweikert VR4 GEN III HSE and boy am I a happy camper. The bass is just amazing and the mid and high are just superb. It's close to the 9 except that it's much, much, much better. You should give them an audition, you're going to like it.

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Jason, what amp and preamp are you using for the Kappa 9? That might be where your problem lies. The Kappa 9 demands prodigious amount of bi-amped power to sound their best. Min888 said that the Kappa 9 had no bass...the problem in his case was that the amps that he used didn't have the testicular fortitude to drive the 1 ohm load that the Kappa 9 presented to his amps. The Kappa 9 are keepers if you can afford the amplification to drive them properly.
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mitch4t is right, put a class D for the bass and some tube for the high freq.

Behringer EP4000 2 x 2,000 Watts into 2 Ohms on the bass and Carver Sunfire Signature 2 x 4,000 watts into 1 ohm on the highs should be enough power yes?