Hi MT,
The Infinity Kappa 9 speakers will require at least one stereo amp that has a huge amount of current as well as high wattage while also being fully stable down to 2 ohms. The Kappa 9s present a severe phase angle to an amp and many amps that are not up to the task will literally go up in smoke. The more power and current your amp can supply the better the speaker will perform - especially at high volumes producing low frequencies and complex musical signals. Passively bi-amping the speakers (with two stereo amps or four mono amps) is even better but careful amp matching is required. Good luck!
Best,
Barry
The Infinity Kappa 9 speakers will require at least one stereo amp that has a huge amount of current as well as high wattage while also being fully stable down to 2 ohms. The Kappa 9s present a severe phase angle to an amp and many amps that are not up to the task will literally go up in smoke. The more power and current your amp can supply the better the speaker will perform - especially at high volumes producing low frequencies and complex musical signals. Passively bi-amping the speakers (with two stereo amps or four mono amps) is even better but careful amp matching is required. Good luck!
Best,
Barry