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8 years ago
For your specific mixer:"The nominal insert send and return level is 0dBu, and the insert return clipping point is +22dBu." http://www.mackie.com/pdf/archive/sr24-4_sr32-4_om.pdf (page 28)Based on this, I'm going to have to respectfully disagree and recommend keeping it at +4 even for your insert connections, and only use -10 for plugging a consumer cd/tape/dvd (etc.) deck directly into the compressor inputs. It's a common misconception that everything unbalanced (such as single-TRS insert jacks) is -10dBV and everything balanced (I'm talking line-level, obviously not mic level) is +4dBu. To the contrary, +4 is common for many "pro" circuits regardless of bal or unbal, and -10 is common for most "consumer" circuits.Regardless, if you tend to run your channel strip preamps far below clipping, you can likely get away with setting your inserted device to -10 which would run it with less headroom -- potentially desirable if what you're inserting is noisy. The trade-off is that your signal has the possibility of distorting even when your red OL light isn't flickering.The last paragraph of http://en.wikipedia.org/wiki/Insert_(effects_processing) is also relevant, describing that not all mixers have hot inserts like your Mackie.
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