Power Cords/ Conditioner/Surge Protectors

The surge was caused by a pole mounted transformed that exploded.

it blew the top right off and it burned until the fire department put it out. 

That was not a transient surge. That was high voltage overvoltage created by the high voltage primary winding crossing over onto the low voltage secondary winding. I assume after hopefully a very short length in time the primary high voltage fuse blew at the pole and opened the high voltage to the transformer.

I do not have any idea what the Utility company’s high voltage to ground voltage is in your area. In my area the voltage is around 7.9KVac to ground.

In the event of an electrical high voltage to Low voltage fault a good portion of the high voltage is taken to ground at the pole. The primary neutral is connected to the secondary neutral outside of the transformer and then connected to a ground wire that is fastened to the pole to the bottom of the pole where it is connected to a ground rod. (Sometimes the ground wire is connect to a square plate on the bottom of the power pole.)

The high voltage, voltage drop to earth soil, is determined by the soil to ground rod resistance. The lower the resistance the greater the high voltage to earth.  The higher the resistance the greater the voltage drop to earth, the remaining high voltage will be on the power line feeding the electrical service of your home. There it runs into another earth connected ground. Any high voltage on the power transformer neutral conductor will again go to ground through the Grounding Electrode System of the Electrical Service. Again the lower the electrode to soil resistance the better.  (Electrode is usually two, minimum, 5/8" X 8ft ground rods driven into the earth.)

The remaining high voltage on two Hot conductors will enter your home.

The high voltage may be only on one Hot line, leg. Or it may be on both.

My computer, server and modem are in different rooms, and had fairly new surge suppressors, so they survived just fine. My printer though was unprotected and was also a casualty.

One thing that can make a difference is the length of the branch circuit wiring from the main electrical service panel. 30ft is the minimum for a Type 3 plug in SPD. The longer the length of the branch circuit wiring from main electrical panel the greater the inductance in the wiring.  

FWIW, I’ve heard stories of an SPD sacrificing itself during a overvoltage event to save its’ connected load. I assume you replaced the SPD. If not, I would.

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Your point about internet is a very good one. I use subnets in my house to isolate IoT devices for security. My 2 channel system uses fiber ethernet, so it is safe from internet spikes.

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I lost $14,000.00 worth of AVR, BD player, and projector to a failed surge suppressor. The worst part is that I knew that they can fail silently, and did nothing about it.

Did you have internet connected to this equipment?

Is the internet that that enters your home Fiber or wire?

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@mikhailark "

"So are they deliberately degrading quality of their expensive gear OR they are actually good engineers and know their stuff? No, what a strange thought."

Who said anything about the designers/engineers degrading the power supplies etc in their gear? I didn't. What I said and what I will again is that just because they  supply generic power cords doesn't prove one way or the other that there will or won't be SQ benefits by using "upgraded" power cords, or power conditioners. . Now, you may be someone who sees/hears no value in them, that's fine. I do, but not all that I've tried have made an impact while with others it's quite apparent that they do in my systems. Unless one establishes that for oneself the rest is meaningless. Enjoy listening as best suits you

@bigtwin 

In response to the OP you wrote:

"I WAS IN THE PROCESS OF WRITING A SNARKY ANSWER TO THIS REPETITIVE QUESTION.WHEN I REALIZED NO ONE IS MAKING ME READ POSTS THAT HAVE NO INTEREST FOR ME. SO I DELETED IT. TALK AMONGST YOURSELVES." 

What an arrogant and selfish response. I have been in situations before where I have brought up subjects previously posted in depth. It happens. But instead of showing some decorum and sensitivity in directing the OP to search the archives, you had to give a dig at your impatient annoyance and wave off a fellow Audiogon member like a leaf on your driveway. Shame on you.

@singere 

Since all of the good advice that has followed the above mentioned screed, you should be confident that people here will still help and be supportive despite the repetitive subject matter.

I encourage you to experiment. 
 

I tried it with Moon 390 and M400s through Sonus faber Olympica Nova Vs. I heard a difference- the noise floor dropped and specifically the lower frequencies seemed to be clearer. And I switched back and forth between the stock and the cables. I kept them. 

I didn’t expect the difference to be worth the price - it was to me.  Hence my recommendation to try and see if it is to you