Insurround sound, the subwoofer is assigned to its own channel.
It iswhere the “.1” in “Dolby 5.1” or “7.1” comes from.
It is also referred to as theLFE(Low-Frequency Effects) channel.

Onkyo
Subwoofers provide that knock-your-socks-off low-frequency impact that any solid home theater system needs.
This enables the same low-frequency reproduction profile for your room.
Be aware of any differences in power output, size, and frequency range.

Onkyo
As you’re able to imagine, that means a lot of cables.
The Wireless Subwoofer Option
One additional subwoofer connection trick is to go wireless.
The considerations and options discussed above are designed to be used with standard powered subwoofers.

Buying multiple subs and setting them up to get the best result can be an expensive and time-consuming project.
This process may differ for different brands.
Optimal subwoofer placementultimately depends on the dimensions and layout of the room.

Sunfire