Can an integrated amp be used as a power amp

OP is trying to use his Hegel H390 as a preamp?

Perhaps trying to access the DAC output of the Hegel, into the tube integrated? If so, are there other/better options to do so?

Some people use the HT bypass on an SS integrated to incorporate a tube preamp into their system, without having to replace an existing integrated amp. Or to evaluate the use of tubes.

Thank you all for such quick replies.

The Trafomatic does not have a HT input.

geof3- my Hegel H390 has a built in DAC, so I want to use the Hegel’s DAC.

Very familiar with the H390... you can configure each output to ht bypass. But still, doing that kind of complicates your setup, unless you are simply trying to evaluate the other amp. Practically speaking, it’s a waste of the Hegel. 

My goal is to have a SS and a tube set up using the Hegel as a preamplifier/DAC. 

It's looking like this option doesn't exist on the Trafomatic, unfortunately.

My other idea wouldn't work either, where I was thinking you could feed an output of the Hegel (if it existed) into the Trafomatic. In the end, you only want one of them connected to your speakers, so this idea doesn't get you there either.