Well I believe in cryo + burn in, but I think you are a little confused on the subject Spiro.
Some preamps are inverted and some aren't and some have a switch so you can go back and forth and it seems this one has 2 sets of outputs. One being inverted and the other one not.
The reason some have a switch or 2 different outputs is because some Amps are inverted and some are not.
So to make sure you can match to any amps you would like to use.
Go ahead and use both but you will have to flip the
polarity on the speaker leads on one of the amps.
Some preamps are inverted and some aren't and some have a switch so you can go back and forth and it seems this one has 2 sets of outputs. One being inverted and the other one not.
The reason some have a switch or 2 different outputs is because some Amps are inverted and some are not.
So to make sure you can match to any amps you would like to use.
Go ahead and use both but you will have to flip the
polarity on the speaker leads on one of the amps.