Burn in after repair?

I trust and have had quite a friendly, supportive relationship with this and other manufactures, and have personal thoughts and feelings about others.  I have also 

owned 5 of their products over the years and respect their additions to our wonderful hobby/interest/passion.  We all, likely, have our values and norms 

we have established over our life's experience. 

     If it doesn’t start sounding better, after a reasonable time powered up/in service: have the builder/Tech check the Bias.

Agreedi think you have that right Noske.

@deludedaudiophile This place just keeps getting more is bizarre.

Fixed

Manufacturers permission jusam? Since when would you need that? 

Since when did you need a manufacturer's approval, as a consumer, to either tell other people that you bought from them or that you had a repair done. This place just keeps getting more bizarre.

I had $600 of recaps/updates on my amp.

Burned it in over 300 hours.

A little too early in "re-burn-in" to know much.  It was one channel that was repaired and I don't have the manufacturers permission to put out info on them.  They are an established high end company that I have had several units from over the years.  It does remind me of new units that I have had that did improve sonically with some use time.  Thanks 

Burn-In here is an endless, contentious debate...I believe it will need some burn in time to sound right, absolutely normal...

Sounds like it might just need burn-in.  However, are you noticing this effect in both channels, or only the one with new repairs?

What amplifier is it? How old is it? How long have you had it? What were the symptoms that something was wrong? Who did the repair? Is the amp connected to the same electronics and speakers then and now?