Quoted from PinballGiant:

Just wanted to add my two cents on fixing the speaker hum. My strategy was based off of wpmcnamara's previous posts. Got rid of the majority of the hum for about $30. Here is a video explaining what I did and the before and after. In short, I just added a 12V buck boost converter on the +12V to the sound board and had great results. Cleaner and cheaper than an entirely separate power supply and plug and play after you build it. Here are some pics too.

[quoted image][quoted image]

Quoted from PinballGiant:

I’m sorry it didn’t work for you. Definitely not my intention to share something that doesn’t work. It’s weird because I have a rottendog board too. I still have some hum but this got it down to a very tolerable level. Will be interested to see if the separate power supply totally fixes it or if there’s something on the sound board contributing too.

Quoted from Phantasize:

Which country are you from? I could be interested. I am from Denmark myself.

Quoted from Asanteiro:

Hello friend ... many say that changing the board lowers the noise but does not cancel it completely .
Others say that with some pinball pro kits it was solved.
Others put a dedicated sound source...
But you have to have a solution to make it original.
Mine (hook) makes a lot of noise to interference.
After an hour the noise is very low but it is there ... I am still waiting for a real and original solution.
Hug Alex!

Quoted from Asanteiro:

Good friend
I will try what you mention.
1 . Can you publish photos ?
2. How do you connect ?
3. When connecting you must program voltage to 12v ? As we did in the other module ?
4. If you publish photos I will guide your project
You say that under the noise, but I don't get it out. I read this from a comment
That's right.
One thing is the noise of the speakers.
Another is the DMD screen noise (this noise doesn't bother me)
If you help me, I will do it.
We can do it!
Alex !

Quoted from Asanteiro:

Excellent. Thank you
This is how I see how everything is connected.
I saw that you tried the other module and it didn't work.
The same thing happened to me.
If you look here in the forum I uploaded photos.
What I most want to see is how the cables are connected to the new module and the sound board.
This new module has to be encoded for 12v ? Or is it automatic?
Is it connected like the other module?
I am not a very expert but with pictures I encourage myself to try it.
I'm waiting for your pictures .
Thank you, my friend.[quoted image][quoted image][quoted image]