Help power pair of Infinity Kappa 9's please

One last thing that night the pre amp was a Phase Linear 3500.

Pick up second-hand 4 Crown XLS 1500 Class D Pro Amp. I can drive my Kappa 8’s with those all day and night without any problems and they sound very tube-like. They work on the 9’s as well. Don’t even get hot.

Pure power is what the Kappas need. And when they get that power all the drivers vanish! It sounds like the air is vibrating itself, like the gentle winds and sudden gusts of Autum. They can sound a lot like electrostatics. And you can get very tuneful, fast, authoritative stereo bass that would put any lone subwoofer to shame! It’s incredible! 

You could probably also use two Carver Signature Sunfires—one for treble and mids and one for bass. I believe that is called vertical bi-amping. I have one Signature Sunfire that I plug in as my back up amp. It is an arch welder. An audio bazooka!

In the last two weeks my Kappa 8’s appear to have trashed two BAT power amps and one Spectron Musician. I am not happy.

I love my 8’s and 7’s. The 9’s (I have too) their physical size and driver height is not suitable for most rooms and most homes do not have the right power runs to power amplifiers that can drive them.

Maybe it’s time to go back to JBL’s?

If you are looking for holographic spatial cues and full frequency extension, what speakers are an easier to drive ‘upgrade’ from the Kappa 8’s?

Not to be snarky, but a lot.  Vandersteen, Vortex Acoustics by Von Schweikert, Ascend Acoutics, Philharmonicaudio, magnepans with a subwoofer, and Salk Sound are a few that pop to mind immediately. There are dozens if not hundreds of options that will be easier to drive and sound as good, if not better. 

I would appreciate specific models of speakers that are upgrades from the Kappa 8’s.  Killing three expensive amps in two weeks is too much.