Amazon.com: Edifier R1280Ts Powered Bookshelf Speakers - 2.0 Stereo Active Near Field Monitors - Studio Monitor Speaker - 42 Watts RMS with Subwoofer Line Out - Wooden Enclosure : Electronics
How to Connect a Subwoofer to a Receiver or Amplifier
PINsub Subwoofer Kit - Multi System
Connecting 2 Subwoofers To One Receiver - Easy Home Theater
How to Connect a Subwoofer to Speaker Level Outputs
How To Connect Subwoofer To Receiver Without Subwoofer Output