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, For Sale: JBL Studio 590's brand new, Local pickup, no separating. It is a powered subwoofer, so it has twin stereo RCA line inputs. Many of the most experienced listeners strongly prefer the performance gains available from this type of design. RCA inputs will be seen in the left and right input options for your subwoofer. If the RCA connectors on the subwoofer are 2 (L and R – In) or 4 (L and R – In and Out), then use the white connector. On some home theater processors, you’re going to find a different connection as an option, which is called an XLR connection. So connecting in a way that allows ALL the elements of your existing system to be fed forward into your REL means that in contrast to the normal speaker/sub system, in which the sound acts a little like a marching band moving past, with the bass instruments and drums lagging at the rear of the band, you are suddenly able to hear the entire ensemble playing at once, in correct timing, rhythm and tempo and suddenly music makes wonderful toe-tapping sense. Articles is our blog where we share insights, information and opinions on subwoofers, hi-fi systems and the joy of sound. Sign up and stay connected for exclusive deals.