2. amps-preamps
  3. 130040-84541

Oh man, I broke my class D amp. Make fun of me. Then help.

So... I made a new pair of super fancy interconnects this evening. Of course I was on auto pilot on the second one, especially the last connector. And, of course I always test my DIY cable projects before install..

Except tonight. Installed the ICs and all I hear is clicking. Not loud, and independent of the volume on the pre. Independent of source. Weird. I shut everything down and figure maybe, for the first time ever, I miswired a cable, so I pulled the new ICs and tested. Sure enough, I crossed my signal and ground. I repaired my mistake, reinstalled and now the amp the crossed IC went to is jacked.

The volume is much lower than the other channel, there is distortion during strong high frequency signals and the sound drops out during strong low frequencies signals. The other amp is fine. I swapped channels coming from the pre and the problem stayed with the amp. I doubt it is the speaker, as there were no sudden loud noises. Just the innocuous clicking...

So, what did I fry? Some kind of capacitor? Or everything? The amp is a Ghent audio monoblock, which is class D and uses ICEpower a/s modules. It is a GA-M500. Here’s its webpage: https://www.ghentaudio.com/amp/ga-m500p.html

I’m fine sending it in for repair, but if anyone has either knowledge of amp design or the unfortunate luck to have done this, I’d love to just fix it myself and save a lot of sending it around the world. Also, feel free to make fun of me. I deserve it. Such are the consequences of hubris.

If you’re wondering, I used KLEI pure harmony connectors, which have two identical looking tabs, one on each side, to solder the signal and ground to. If you look even remotely closely you can easily tell which is the ground.. but it’s not at bad as if I had done this with a more traditional RCA connector. That would have been really pathetic. 

Also. Recommendations for repair shops please.

Ugh.

128x128toddverrone
asvjerry's avatar
asvjerry
4,597 posts
 
Yeah, a 'downer', fitting the Monday mold....BUT....

Spouse announced she's going to carry on with her hobby.  Made my day.  Feces occurs, so scrape it up and fling it @ fates' face....*growl*L*

You do so too.  Let your buddy's buddy take a crack at it.  Let someone who has some experience with the D's give it a go.  He'll either find the problem or pronounce it truly screwed.

Suggestion #2:  Get spouse favorite flowers, apply huge hug and kiss, and another thank you.  They don't make a lot like her, and she's Yours. *S*

Elder son & porn....well, it's the most popular thing on the 'net, and curiosity overcomes 'no' because it did with us.

The racist white super sh*t is harder.  Take him on a drive through any local ghetto (most cities have something like that) and ask him if he'd like to go for a walk....home, from there.  There but for (your favorite deity) and the luck of being your son goes him, and their reality still isn't pretty despite the broken promises and hopes of intelligent people.  That latter group is aware that the bulk of the people on welfare and food stamps are white, and generally single women with children who are in that state because of guys who take advantage of them and split.
If there's anything he should learn to hate, it's the rampant stupidity on those websites.  

toddverrone's avatar
toddverrone OP
840 posts
 
Jerry - that's good to hear. Your wife sounds like a good one too. Patience and understanding in a marriage are rare, one thing I love about the people on here is they recognize that. I've been on far too many forums where there's plenty of denigration of spouses who get in the way of the hobby. That's the wrong perspective.

As for the porn, I'm not worried about that, but we did talk about the difference between 'healthy' porn, where it looks like everyone is enjoying themselves, are not drugged and have real bodies, vs the rest. The racist stuff comes from us living in a bubble here in NW Arkansas, where he doesn't see its consequences. So he thinks it's absurd and funny. Now I've got him reading Roots. That should help bring some perspective..

@atmasphere I think I tried different sources, but now I can't remember. I'll try again after I put the amp back together. Thanks for the insights!
gregkohanmim
153 posts
 
Todd - I'm sorry about the family stuff and I couldn't possible help there but if:

"my wife, the breadwinner, just said "buy some new ones"" - I can guarantee you that I'd have a UPS tracking number within 5 minutes (and I love my setup)!

At least on that front, you're in good hands!

Greg
asvjerry's avatar
asvjerry
4,597 posts
 
Todd...yeah, after 30+ years, she isn't perfect but she deals with my flaws and foibles too.  There are those that didn't understand us, but we've outlasted them all.  And the long haul is the one that counts....;)

And you took the young bull by the horns....Bravo.  There is 'fair porn', but it's rare.  The material aimed at the female audience has a better 'tilt' to it, but most men don't even know it exists...and most could care less.  It'd surprise them if they paid some attention to it.  The soft touch generally goes over better, but that's an 'advanced concept' when you're young. *S*

NWAR...by the Ozarks...pretty country...and some reactionary minds, freaked by 'change'.  He's right, absurd is correct.....funny, not so much.
Watch '10 Years a Slave' with him.  That'll drain the humor out of it....;)

Pardon to all in this forum, BTW.  The above is a long way from a class D disaster, but...unlike the fish (we mourn the small entities that lived with us for awhile, all of them...) here's a chance to 'save a life' in a meaningful way.  I can't resist trying to help, even if only with MHO in a hopeful comment.

Back to saving an amp...;)
asvjerry's avatar
asvjerry
4,597 posts
 
"I'm not black, but sometimes I wish I wasn't white."
-Frank Zappa's observation on the Watts Riot.

I could see the smoke from my home.

*Looking at my hands, my arms....*
We call This 'white'. No.  Albinos are white.  What we have here is a rather miserable mottled beige, streaked with blue-green veins and reddish-pink blotches nearly everywhere....
Maybe a better description would be 'very bad camo'.  Way too light to be successful at 'blending into' anything but ourselves. *G*
More to discover