I've had my Kemper Power Rack for about five months now. When I first got it, I tried it with my Alto TS115a powered PA speaker and it worked flawlessly. Shortly after that, I started using guitar cabs with the Kemper and have been since then. Last night I switched back to the PA cab and had hardly any volume. I turned the volume knob on the back of the Alto up to the maximum point of the line level range, turned the main volume and profile volume up to max on the Kemper, and still had hardly any volume (but I did have some pretty awful output clipping).
I double checked the levels in the output menu and the main volume is up, with "Main Out Link" enabled, and "Main Output" is set to "Master Mono". Direct Output and Monitor Output are both also set to "Master Mono" and SPDIF Output is set to "off". Monitor Volume, Direct Volume, and Headphone Volume are turned all of the way down to the "infinity character". Main Output EQ is flat except for the Bass which is at -0.5.
I'm using the Right XLR output.
Firmware version is 2.6.0.10201B
I experimented by turning the volume knob on the Alto up higher--into the "Mic Level" volume range, and then I was able to turn the levels on the Kemper back down to normal levels, and still have good sound and plenty of volume.
What worries me is that this could damage the Alto... Feeding line level signal into it while it is set for Mic level signal. But it is the only way that I can get usable volume from the Kemper XLR outs.
Did Kemper change something in the firmware, or is my Kemper broken? Any other menus or settings that I possibly overlooked?