Best output vol to use with external tube power rack?

    Hi, I have a mesa 20/20 tube power rack, I want to use it stereo from the main out to mesa power rack to 2 cabs. What is the best output level to send to the mesa input? When I send to FOH i normaly use -18 to -20dBs.

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    You’ll likely have to try a few settings and use what sounds best to you. My Mesa 2:90 has instrument and line level inputs so my output settings vary depending on which I plug into. My preference is to run the signal at 0db into the line input and use the power amp volume to control the loudness. Some power amps have a sweet spot at higher volume, so it might make more sense to run a low Kemper level into a hotter 20/20. Just try as many combinations as possible to figure out what sounds best.