BlownCamaro
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- Joined
- Apr 24, 2025
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I am using a Fosi Audio BT30D with stock power supply. The audio output from this amp is just fine, HOWEVER the EMI/RFI being emitted from it causes massive potentiometer shake in anything that is in the same room with it. I do sim gaming, and it affects my steering wheel, pedals, flight stick, throttle quadrant, and rudder pedals. Anything with a potentiometer!
The amplifier runs haptic servos on my seats and also speakers on the seatbacks and is connected to an A/B switch. I've tried literally everything to eliminated this noise including ferrites on the pot cables and nothing stops it. The more load on the amp, the worse it gets as I have tried disconnecting speakers/servos and it still does it even with one speaker connected - just less so. I've tried running an extension cord to another breaker to power the amp and that makes no difference. It is NOT a ground loop issue.
Only one thing made a change - and that was taking a piece of wire and wrapping it around the barrel connector of the amp's power supply then ground it to my metal rig. This reduced pot shake by about 80%! HOWEVER, it causes a tweeter whine and the amp heats up.
Do I have a bad amp? Do I have a bad power supply? Is this normal for a class-d? Do I need to move the amp to the other side of the house and run 50-foot speaker cables? I'm about to give up here.
The amplifier runs haptic servos on my seats and also speakers on the seatbacks and is connected to an A/B switch. I've tried literally everything to eliminated this noise including ferrites on the pot cables and nothing stops it. The more load on the amp, the worse it gets as I have tried disconnecting speakers/servos and it still does it even with one speaker connected - just less so. I've tried running an extension cord to another breaker to power the amp and that makes no difference. It is NOT a ground loop issue.
Only one thing made a change - and that was taking a piece of wire and wrapping it around the barrel connector of the amp's power supply then ground it to my metal rig. This reduced pot shake by about 80%! HOWEVER, it causes a tweeter whine and the amp heats up.
Do I have a bad amp? Do I have a bad power supply? Is this normal for a class-d? Do I need to move the amp to the other side of the house and run 50-foot speaker cables? I'm about to give up here.
