I have a powered KPA (and a Helix).

I've been looking at the Line 6 PowerCab 112 Plus, reading reviews/youtube.

I looked at one at Guitar Center that was connected to a Headrush board.

I wasn't overly impressed, but didn't have anything to compare it to.

I like having the different speaker models built in.

Just wondering if anyone else has used one and their thoughts, or should I wait for the Kone?

Thanks!

Using my Vox AC30 speakers which are Blue Alnico.

Tried with my H&K 2x12, but didn't like the sound as well

And even more interesting playing through different cabinets/speakers can make a huge difference. I've even played through a different set of Celestion V30s and they sound different. I like the Alnico Blue speakers I've played through. 2x10" or 2x12" sound great with the powered Kemper. I'm afraid I would be disappointed with a FRFR speaker, but haven't tried it.

Wonder how it compares to the Line 6 Powercab? I’ve been looking at both.

Try Sonic Visualize http://www.sonicvisualiser.org it's free and supports many types of plug-ins that allow you to analyze music.

It may be what you're looking for, not sure.