ABSTRACT
There are several standards for line signal levels. The −10 dBv standard is used for a lot of semi-professional recording equipment as it gives more headroom with unbalanced connections-the professional levels of +4 dBu and +6 dBu assume balanced outputs which inherently give twice the output level for the same supply rails as it is measured between two pins with signals of opposite phase on them. See Table 16.1.
