Hey sorry, thought I repliedThanks for getting back to me - this all really helps!
Ah, in this instance, I would suggest leaving your unity gain staging as is and let's try some other options if you dont mind.
Could I ask that you disable all processing in OPUS and see if the noise is present in your signal chain pre-OPUS? I am wondering whether the poweramp is amplifying this a little more as driving the volume of the poweramp emulation will add a degree of compression that in turn will raise the noise floor.
For another test, could I ask that you try plugging the OPUS PSU into another power outlet and see if this alleviates the issue. In addition, trying your Cioks DC7 could also be a great test.
If you could report back and let me know the outcome of the above, that would be super!
Thank you!
I think you're right, and the Opus' various tone sweeteners were amplifying a bit of background sound. I switched from using my capo to shift line Olympic in addition to trying powering it a different way, and via the headphone port and DI of the SLO more background noise was apparent.
Confusingly, it seems to be caused by my Fortin zuul noise gate - when it's bypassed, there's pretty much no background noise, and when it's on there's a low hiss type sound. I tried putting the zuul in the fx loop of the SLO and it made things a bit better. Not sure what's going on there, but I'll have to test more.
All that to say, I think you're right and the power amp + maybe enhancer in the opus were amplifying noise that was present that I couldn't hear as well without them, and now it's sent me down the rabbit hole to resolve that so I can have quiet recordings with the great tones the Opus is outputting
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