As good as it gets

I recently purchased a new  integrated amp. It has tube's and I wondered if there is a burn in period, or do they sound as good day one as after 4 weeks?
I guess I hope it improves a little. I am comparing it to another good amp and don't hear the sound I as hoping for.
One thing really frustrating, people dribbling little drabs here and there. Just come out and tell us wtf is going on, so we can help, okay?WHICH amps? If you want your POC to sound like SOTA, that ain't happening. If its close and you wonder if it will get there, well then you need to tell us which amps AND describe in what ways its close or different.
I could just come out and tell you exactly what to expect in terms of changes as a component gets more hours on it. Its a very similar progression almost totally regardless of what the component is. Or even if it is a component at all- Total Contact and Omega Mats break in too.
But its a lot better if you learn to think and describe better. So we can, you know, help better.
good one Miller! I feel the same as you and get frustrated when OP’s ask for advice and don’t give enough info to allow us to provide help or an educated opinion and then there’s the OP’s who post their "system" in the most minute details which is too long or complicated to even look at.
good notes on amps should be sounding nice out of box and break-in only slightly makes it better. 
Yes but that is the answer to the question of I don't like this but they tell me it just needs to burn in, is that true? And the answer in that case is: no.
But that's not the question here now, is it?

The first question the OP asked has been answered. The second question he needs to do some homework and resubmit.
My all tube integrated amp took some time to sound it's best, whether its the internal components or tubes I can't say. Then I could begin tweaking my system for better performance. I sounds wonderful now.

After I spend some time listening to my HT system I'm always amazed and impressed when I fire up my 2 channel system for some vinyl or cd playback... even FM radio is a joy to listen to.