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B-6 A UDIO C ONNECTOR W IRINGUnbalanced Analog Inputs and OutputsUnbalanced connections are not preferred in professional applicationsbecause they greatly increase the possibility of ground loop-induced humand noise. In many practical situations, however, they must beaccommodated.Unbalanced inputs should be wired as shown in Figure B-6.UnbalancedOutputRCA orPhone--XLR-3F3SonicAnalog Input1k004k99100 pf4k99Out +(tip)+NCShield+21Case1k002x220 pf4k994k992x220 pf-+100 pfFigure B-6Connecting Unbalanced SourcesNote that the shield connects with ground only at the Sonic input, and pin3 is tied to ground. This arrangement should yield the best noise rejection.To drive unbalanced equipment inputs, wire the connections as shown inFigure B-7.4k991k0033 pf4k99-+100 pf4k99-+2402402x220 pfSonicAnalog Output51.151.12x220 pfXLR-3M3NC21CaseShieldRCA orPhoneUnbalancedInputIn +In gnd47 µfFigure B-7Connecting to Unbalanced Inputs