In general, you want to stick to using gear with +4 dBu line inputs and outputs whenever you can, since it provides more headroom than -10 dBV gear. Pieces of gear that use these two line level signal variations can be connected to each other, but just make sure that you boost or attenuate the signal within your pro audio gear to accommodate your consumer gear. In this case, you’ll want to turn down the output of your +4 dBu gear. Routing signal the other way, from a +4 dBu output to a -10 dBV input, can overload the inputs on consumer gear. However, you’ll usually end up with a cleaner signal if you boost the gain within your pro audio gear, as opposed to overdriving the outputs of your consumer gear. This lets you make use of both consumer and professional-level audio equipment.Ĭonnecting a -10 dBV output to a +4 dBu input will always increase the noise floor. If you’re working solely with pro audio gear, most of it likely calls for a +4 dBu line level signal, but some pro audio gear might have a switch that allows you swap inputs between a -10 dBV and +4 dBu mode. Figure 2: -10 dBV line level consumer gear vs.
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