No am not having a subwoofer at this moment . It’s a 2.0 setup in which am planning to add Oberon Vokal , will it be challenge for the AVR Denon 1800 to drive in this planned 3.0 setupAm using Oberon Vokal. It is a good center channel and is rated at 4 ohms. But if there is a subwoofer, am sure the amplifier can take the load without any issue.