How to Connect a Subwoofer to a Receiver or Amplifier May 17, 2019There are a few ways that one can expect to connect a subwoofer to an amplifier, receiver, or processor (also known as a home theater receiver). The most common method is done by connecting the subwoofer to the SUB OUT or LFE output of a receiver/amplifier. But you might also come across a subwoofer that uses stereo RCA or speaker wire connections.Revel B110 Back Panel · Before You Buy a Subwoofer Attaching a Subwoofer to a Home Theater | Smarthome Having a subwoofer integrated within your home theater is essential for experiencing full and accurate sound. The Subwoofer is responsible for reproducing and projecting low-end frequencies well below the capabilities of most speakers. The subwoofer can range in sizes from as small as 6 1/2 inches or less to a massive 18 inches or more.