Why do subwoofers have 2 RCA inputs?
Subwoofers typically have two RCA inputs for a few reasons: Compatibility: Some receivers and amplifiers have only stereo subwoofer outputs. If you want to use a subwoofer with one of these receivers or amplifiers, you will need a subwoofer with two RCA inputs. Downmixing: Some receivers and amplifiers can downmix a surround sound signal to stereo. This …