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Audio Interference with high wattage devices on the same circuit?
Yall
Registered User regular
Registered User regular
So I have an AV problem which I *think* is related to a power/electrical issue:
I'm have an Optoma HD20 projector with an HDMI signal coming in and I'm trying to connect the audio out (1/8th) to a Yamaha DSR112 12 Inch Powered PA Speaker. However, the audio signal is relatively weak and very buzzy/scratchy.
I've tried connecting other devices (with the same cables) to the PA speaker, and it sounds great.
I've also tried connecting other devices to the audio out (old low wattage PC speakers, multiple headphones etc.) also sounds great.
I've tried several different cables, etc to connect the PA speaker and the projector, all with the same issue (washed out audio with lots of noise/interference).
In short the only thing that doesn't sound good is any connectivity between the two devices.
The only conclusion I'm able to come to is that because both the speaker and projector are presumably higher wattage devices , and both on the same breaker/circuit, that I've got some type of phase issue or something like that going on due to them being on the same circuit.
Does this seem like a reasonable conclusion?
I'm have an Optoma HD20 projector with an HDMI signal coming in and I'm trying to connect the audio out (1/8th) to a Yamaha DSR112 12 Inch Powered PA Speaker. However, the audio signal is relatively weak and very buzzy/scratchy.
I've tried connecting other devices (with the same cables) to the PA speaker, and it sounds great.
I've also tried connecting other devices to the audio out (old low wattage PC speakers, multiple headphones etc.) also sounds great.
I've tried several different cables, etc to connect the PA speaker and the projector, all with the same issue (washed out audio with lots of noise/interference).
In short the only thing that doesn't sound good is any connectivity between the two devices.
The only conclusion I'm able to come to is that because both the speaker and projector are presumably higher wattage devices , and both on the same breaker/circuit, that I've got some type of phase issue or something like that going on due to them being on the same circuit.
Does this seem like a reasonable conclusion?
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I think you may be right. Furthermore they might be on different circuits so I'm gonna try the same outlet.
How long is the audio cable, btw? Is it possibly picking up interference?
I just realized this makes no sense. If the noise is coming from inside the projector, which I still suspect it is, then balanced output would not help. I had this exact same problem with a computer to powered speaker connection and what solved it was getting a USB DAC, and while that included upgrading the connections to balanced cables it's not the balanced cables that solved it.
I'm thinking it's almost certainly a ground loop. There could be other sources of interference as well, but I'll be doing a test run tonight using wireless HDMI and the same outlet. I'm hoping the combination of the two will solve the issue.
Will let you guys know!
Thanks for all the advice!