Sorry this is probable a little off topic but how can you tell the speaker hum from the DMD buzz? I guess I can disconnect the speakers. Is there anything that can be done to reduce the buzz from the DMD?

I've been waiting for JP forever, will buy one the day they announce it.

Thanks for the info guys

Unhooked my speakers last night and blissful silence, I thought for sure that insane buzz had to be the DMD. Ordered the power supply last night, thanks for the info.

Just hooked up the new power supply what a difference best 15 bucks I ever spent on a pin. Thanks guys

Have discovered the weirdest qwerk with my JP after installing the new power supply. Now when the machine is powered off my powered Bose sub stays on and hums. Never did it before the new power supply and I confirmed the power is off to the new supply. I swapped it with a different brand of sub I had on another machine and that solved it. Was really strange though. Not sure why the Bose sub started acting up. Anyone else had that sub do that on a machine, its the standard one you always see posted for sale on here.

I thought the same thing and was wrong. Disconnect the speakers or the DMD and confirm.

I found the best solution starts around post 250 adding a second voltage converter. Cheap, easy and works 100%, my machine is dead silent now. It's a little ugly inside the back box if you a purist but easy to restore to factory condition.

I would disconnect the DMD it is probably the source if you still getting the hum after adding the new power supply.

Put a buck boost in my Phantom of the Opera, and it made a world of difference. I never noticed the buzz when the game was being played but was annoying when the room was quiet. Now that it's gone the game sounds so much better, I'm amazed at how much it interfered with the audio.

I do love the progress of pinball mods on pinside. They always start DIY, then get simplified until someone packages it nicely for the folks that just want plug and play. Then we all know what the final step, this is not a buck booster now its the Buzz Buster and it has an... LED! No mod is truly complete till it has an LED.