OK. So I used the PA5 again. It's been 2 weeks. Just now I heard a loud POP and now the right channel is now significantly quieter than the left. Like a year ago, one channel dies way sooner than the other. Thankfully my speakers don't seem permanently damaged.
Functional devices are consistently reliable. Defective devices can be inconsistently faulty. I know the amp is faulty. But does Topping know? What if I spend $50 to ship it and they can't hear the issue I'm hearing? The right channel was entirely dead months ago. Then it became fine for 2 full weeks. Topping's not going to QA my Pa5 for 2 weeks.
Everyone here has audio as a hobby so they struggle seeing things from an outsider's POV. There's lots of knowledge people take for granted which seem like 'common sense' which only seem that way because they're talking about audio all the time. I think audio is extremely complicated and that's before the equipment failures. Things just don't go to plan most of the time for a million reasons.
My amp was placed in an out of sight place. It's a pain to service due to that. OK, I took pa5 out and Buckeye in. Never have to worry about it again. Right? Wrong. Ok, dust off Pa5 and test it again. Pa5 defective. Put cables back to Buckeye. Wait. Which cable is for which channel? Which way do they go in? Are they *fully* seated? (They sometimes don't if I'm not careful w/ the Buckeye.) Can't see anything on the back, gotta move things around. Oh, cable too short because I opted to try to move the amp forward so I can see behind it better versus disassembling my entire setup. Ok, amp is now pulled forward enough but strain on cables is causing velcro holding cables up behind my desk to start to buckle. I dunno WTF is going behind my desk unless I move everything aside and crouch behind it because of the myrid of cables velcroed to be tight. Grrr.
I just want to be done with audio and move on with my life. I got so much other crap I have to deal with, I really don't need this right now.
The idea that I hallucinated loud pops on two ocassions and a dead channel that Topping agreed was dead last time is ludicrous. This time I took another video, showing that right channel is now significantly quiter than the left. It's very audible in person but I gotta record on my garbage cell phone in potato quality. I'm going to email Topping again. With my alt email because Topping's emails can't send to my gmail address for some god awful reason. I don't think Topping wants to accept an email exchange from over a year ago via a different email address I claim to be mine linking to a Google drive video that can't be downloaded anymore, where the Topping employee agreed the Pa5 was faulty. So here we are.
Boiling down entire post into 3 points: (tl;dr)
- Amp worked for 2 weeks. Now heard loud pop and right channel on amp is too quiet.
- I'm concerned about safety of my ears and speakers by continuing to test the Pa5 and revealing issues.
- I'm concerned about Topping repair only testing Pa5 1 time and concluding whether it is faulty of not based on that when my unit has shown it can work OK for some time before dying again. An electrical test of some kind mind be able to see something is wrong more definitively.