Created: Jul 16 2018 | Updated: Aug 24 2018
Some subwoofers have the option of RCA (unbalanced) and XLR (balanced) for a connection method. Generally, RCA is fine for the typical 3 to 6-foot connection. For longer connections, or for those in interference-prone environments, XLR is the better choice. (Note that running a low-voltage connection alongside an AC power line is not a good idea to begin with.)
Some subwoofer's offer the option of using Speaker Level inputs. These inputs are useful in certain applications such as when the subwoofer is being used to extend the frequency response of specific speakers, but we advise using the RCA or XLR inputs whenever possible.