Im about to sell the quad cortex for an amp if i cant figure this out. I run QC into a line6 powercab 1x12.
When using a 1/4 TRS to 1/4 TRS (balanced), there is a terrible flubby sound coming out of the powercab, which is not present when using XLR to XLR on outputs 1/2. It sounds kike the power cab is clipping, but there is ZERO clipping on the QC or the powercab.
I use the powecab in FRFR and use ir’s/cab blocks. All of my presets are not clipping at the output block, nor the I/O screen, i have no clipping at the input, default 1m impedence. There is zero clipping anywhere on the QC, and the light on the powercab is green, and sometimes blinks yellow. There is zero clipping anywhere.
I want to use outputs 3/4 because they are hotter than outputs 1/2. Outs 1/2 are not able to deliver a hot enough signal to the powercab.
Does anyone have any advice? Im about to pull my hait out.
Does the flubby sound happens if you connect the TRS to another cab, PA speaker or audio interface? if not than the problem is with the Powercab. Also you could use the XLR and boost the output a little the difference between the TRS and XLR output is not that big
Try using an unbalanced TS cable. If the flubby sound went away after that, than the TRS output is too much for the cab (it’s higher while using TRS, c.f. manual)
It does go away, however if the output was too high for the cab, wouldnt that cause the cab to clip? The light on the cab is green, and huts yellow on hard strums as intended.
I mean, that’s kind of a misconception. For proper gain staging you shouldn’t really have your signals going into the yellow and definitely not the red. You won’t hurt anything but by going into the yellow you’ll have minor clipping issues such as you’ve already experienced.
Since you are out of headroom on the XLR outputs, die you try lowering the presets overall output volume a little bit? If you are really maxing out the headroom, maybe the balanced converter of out3/4 is working on the edge of its capability? I always try to target -6db output level for my peaks, so that the output stage as well as the input of the next device (FOH) has a little bit of headroom left.