Is this purely a coincidence, is there an underlying problem, or am I just crazy?

So I had a Rockford Fosgate 150a2 for about 3 years, no problems. Then all of a sudden, bam. Right channel stops working. Did the RCA switcheroo test to make sure.

So I get a Phoenix Gold Amp 200watt somethin or other, the one with the fan, Im too lazy to look up what its called. I've had it for not too long, maybe about 6 months. Bam. The right channel goes out on that one. The channel just makes this noise that whines with the aceleration of the truck. Did the RCA switcheroo test to make sure.
So now maybe if im lucky It'll kick on for a song or two a day.

Is this just a coincidence, or is there something that could be causing my amp to go out? I rewired the speaker wire in the door, and went from there till I found the problem. I was stunned when I found out it was the amp, because of Phoenix Gold's reputation.

Ive been doing car audio for about 10 years now so I know all the wiring is right. . .

Anyone have any ideas, or is it just a streak of bad luck?
thanks for any help