Recommendations for power Infinity Kappa 9's pease

[efertheredfish]

I have to disagree, the larger Adcom 5500/555/545/5400 are high current design, that's a fact, whether enough to drive K9's not sure. Interesting you'd put them down since they too are Pass designed. I used the 5400 & 5500 on Dynaudio 4 ohm speakers, which are pretty stable, the amps rocked them without breaking a sweat.

Also, Bryston are rock solid high current amps which are in an entire higher level from Adcom.

Both the Adcom and the Bryston cannot deliver the current Kappa's need. If you drive them in extended mode, it switches off pretty fast. The Parasound and Vincent still work very well.


The Adcoms and Brystons are good amps, but they can't handle the low impedance the Kappa 9's will visit. I have two of them here for repair :-)


Cheers
Stefan

[Feanor]

Both the Adcom and the Bryston cannot deliver the current Kappa's need. If you drive them in extended mode, it switches off pretty fast. The Parasound and Vincent still work very well.


The Adcoms and Brystons are good amps, but they can't handle the low impedance the Kappa 9's will visit. I have two of them here for repair :-)


Cheers
Stefan

I'm bemused by this whole topic. If the Kappa 9's are indeed as difficult to drive as Efertheredfish makes them out to be, then I suggest they're more trouble than they're worth, (given the huge variety of great speakers out there).

As ever, it's not just the impedence range but also the volumes that count -- an amp might handle 2 ohms at 20% of rated output but not at 100%. Cooling is a factor too; fans might be necessary.

If one must live with such an impractical speaker and, at the same time, have a limited budget, then consider a good professional amp. E.g. a QSC PLX1802 that can deliver 900 wpc into 2 ohms.continuously; about US$900.