Help power pair of Infinity Kappa 9's please

From another perspective: I have Kappa 6's, 7's, 8's & 9's all owned since new in 1987. I've powered them all very successfully (right now using the 7's & 8's) with Harmon Kardon Citation 22's. Two amps in the bi-amped mode. I haven't blown anything in 23 years and have driven all of them in various combinations at levels to make your ears bleed listening to RUSH! Citation 22's come up on ebay regularly and sell from $200 to $400.

I think with all the naysayers in this thread, it's worth mentioning that there are two modes for the Kappa 9 woofers to operate in:

1. The "extended" mode, which is the "amp-killing" mode that goes down to 0.8 ohms.

2. The "normal" mode, which puts a 1 ohm, 50 W resistor in series with the woofers - thus raising their impedance to levels more like the Kappa 8.

I used an Adcom GFA-555 to power my Kappa 8s - and I was never for lack of power or stability. The only time I ever blew a fuse was when running a 20 Hz test tone at obscene volumes - and it was the power supply fuse, not one of the output fuses.

You could almost certainly power the Kappa 9s in normal mode with a 555 (or any other similar amp) as well - leaving you a good $2200 or more in the bank to save for an amp that can run them well in extended mode. Until then, you can party hard with only slightly less bass.

On the other hand if you find an Audio Research M300 you might be in heaven. Arnie has developed the Kappa 9's with that amp.

own kappa 9s run them with a bryston 4 nrb and bryston pre amp and 2 powered subs. Have the speakerers set on normal on back which reduces the low end while keeping everything else same. This makes the amp use less power making it more efficient. This is were the subs come in to pick up the lost bass. This made a HUGE difference. Have looked to trade in the kappas but havent found anything yet that sounds the same even at 3500+ but this is just my opinion what ever sounds good to you is the way you go.

I'm quite happy running my K9's with a pair of Threshold SA/2 monos. 100w/ch but plenty of current. I have run the speakers with a pair of Threshold S/500 II's in bi-amp mode as well and honestly the SA/2s sound way better.