Rebuilding faulty Edifier S730D 2.1 speakers?
Hey! Apologies if it's not the sub for this.
So I have the device above for 6 years now but it has some issues, like constant crackling and popping noises from the speakers that starts off stupidly loud when the device is powered on and it subsides in like 10 minutes but never goes away completely. Anyway, whoever I took it to gave up or told me it was unfeasible to fix it based on costs, but nobody really knew what was the issue.
Some specs are 10" sub, 300W RMS, 2x75W sats (5Ω?). Forgive me but that's all I know and that's where my (lack of) knowledge ends in general.
So I'm wondering how difficulty would it be to give it a new life with a completely new power supply, driver or whatever else is inside it (like it has a huge circular transformer inside, like a very big doughnut), so only using the sub and the two speakers which I still love. Like I don't care about the LED screen/controller or anything else really, I just want it to work via PC.
I'm obviously a noob so I'm just wondering if it's something that can be done.
Posted Dec 22, 2022, 7:33 PM UTC
Sounds like a connection issue somewhere. It may well be a very simple fix, like one loose cable or solder. Does the noise come out of 1 speaker or all of them?
Both, but it slowly changes which one is louder where there's no input. In the past it also had the same issue for a few weeks where it did the same but with the subwoofer. Then it went away completely. Now it's back but with the regular speakers while nothing changed on my end, not even its location. I've took it apart, measured everything I can with a multimeter (but I don't know much about components) and many hours of googling and even hours of ChatGPT help (I've learned it's great at bullshitting but also providing components info based on model or whatnot numbers and measuring details) but everything seemed fine to me.
It has some pretty big caps but I can't measure them and everything inside looks fine.
The whole thing is not grounded by design and is running on an online UPS so it gets perfect sine-wave 230V/50hz (for years).
But my noob-sense is/was still stuck on a power supply or some capacitor issue, since turning it off after a while there's only massive loud noise, like really loud (and inaudible output sound) that gets faded and output coming to life but the noise never goes away. Like it has to warm up.
I know it's a relatively crappy (=very loud but "dumb") speaker but it's great for parties and I do not want to toss it if I can avoid it.
I've tried so many things like replacing speaker wires, inputs, switching L/R speakers, etc. that it would take longer to write what I did not try.