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.
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.