Cardas Female RCA to Female XLR Adapters (pair)

Use these only if you have an XLR-only component that you need to connect to an RCA-only component.  

From Cardas 

The standard for female XLR to female RCA adapters is for pins 1 & 3 not to be shorted. All other adaptor configurations (male XLR to female RCA, etc.) have pins 1 & 3 shorted unless otherwise requested. Most equipment prefers (or requires) adaptors with the standard wiring. Some equipment requires that pins 1 & 3 not be shorted. Your owners manual should tell you if such an adaptor is required. Cardas Audio does not have a list of equipment that requires and/or does not require that your adapters have pins 1 & 2 shorted. Only your manual, or the manufacturer, can answer that.