Quote:
Originally Posted by jimmorgan
agedhorse, would you mind answering a few questions about the Rosette?
What's the best way to run a balanced line level signal into the amp? There's the aux input on the back, but that sums to mono so a balanced signal would cancel itself out.
Is it possible to use the effects return as a line in? And would that be a good solution?
Thanks.
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Sorry, I missed this question...
There are several ways to do this, depending on what on-board signal processing you need. The balanced input on the front will handle a line level signal with the gain set low (there's a fair amount of headroom in the differential input amp stage), so if you were to set the input gain to 9:00, and you might need to set the master a little lower than usual as well, you should be good to go (with all the eq on the Rosette available). If you need more headroom, turn the output level of the external mic pre down a bit.
You can't really (easily) use the effects return as a line level input because it's a parallel loop at the effects insert stage.
The other option is to use the aux input as a line level input, but to do so you would need an adapter that connects pin 3 to pin 1 (converting the source to unbalanced) which would also tie pin 3 to the sleeve. Sometimes you can leave the ring (which would be pin 3) floating, but not if the mic pre has a transformer balanced output.
As you correctly noted, you can't take an XLR to TRS cable directly into the aux input because much of the signal would cancel out due to the summing of out of phase signal halves.
Hope this helps.