Amp repair...What to expect.

My sunfire SRA is predecessor to 300 and needs an attention because it became noisy at idle. So far I've done reapplying a fresh solder to input XLR jacks and to binding posts and all of power transformer outputs. It solved problem partially, but my next step is ongoing to test power-supply caps and replace them. Another culprit of decreased performance quality is actual wear of Tripath chip(very inexpensive itself and very easy to replace) that will need replacement together with provided service(I'm not sure if that was done, but very very likely).
My expectation that I will
1. get rid of humm
2. get some edginess or brightness while tripath chip(that is a logical circuit) will 'adopt' to the output stage for the next 20...50 hours of listening.
3. i don't plan to expect loss of sound detail though and don't know the particular reason for that.

should not take long. maybe a week full of listening or running some music at low volume levels.

Yea maybe 2...3 years indeed or what?
Rule of thumb is if it sounds bad out of the box, the burn-in won't fix that.

As I understand they've done the job on dead channel and as a matter of fact decided to replace the same elements in the live channel too. As a living studio and stage techie, I would probably be able to take a look at repair project done if you can post pictures of an open box. Output transistors in particular close-up.

I would take a look first. Not only substandard parts, but project testing datasheet. What have you been provided as your receipt? Any replaced element listings? How many transistors had been replaced? All details.

That is to say:
They've only repaired one channel and it will take more time before they become identical to bring your soundstage back. Don't worry about blue caps.
To be honest I'd do the same, because it's very easy to screw up parameters on digital amp so it will sound like garbage. To be more consistant, I'd probably test transisor's transients(no worries about the brand either) to match one of the pulled-out live ones and than find the one that mathes or simply get the whole batch of them to replace them all, but it's whole different price point of repairs. I believe that they've matched your transistor, but no matter how precise you are, you'll still have some gaps in parameters to be settled.

Hi, I've just completed my project replacing filter caps and reapplying solder to all joints of all boards. My amp is now quiet and sounds great! I couldn't stand the fact that I will have to replace it. It sounds very close to class A at any volume setting

Replacing parts WILL be a great challenge. These amps aren't supported anymore by the manufacturer for long time already. God only knows who possesses schematics as well if the problem will rise more complicated. Assembled boards to replace aren't manufactured either so exercise safety and protect your unit with surge protectors. There are also not too many of them for sale either as they become slowly the legend of hi-def audio.

It's not break-in it's parameter settling of mainly large signal components such as power transistors and it's not 3 months worth of listening. It's substantially shorter at least audibly. 25...50 hours is more realistic.
Leaving unit on stand-by for a few days will also do the trick.

I've seen that, but there are much better options here at 'gon for $700.

For those who's not technical, I'd say that it's still a bargain even if you will have to send the unit back-fourth to/from WestCoast to service it.
They sound like class A more than class A/AB/B and they never run hot with plenty of power to drive any speaker and SILENT when no music no matter if you mute or unmute your preamp.