I am using a powered sub, but there is no output.
There are a couple of things that need to be checked. The first one is to make sure that the subwoofer is connected to the jack marked "SUBWOOFER OUTPUT", and not the jack marked "SUBWOOFER INPUT" located in the 6 CHANNEL DISCRETE INPUT section.
The second item is to check the BASS/LFE OUT settings found in the receiverÕs set menu system. If the setting indicates MAIN, there will be no output sent to the SUBWOOFER OUT jack. If the setting indicates SW, the bass will be directed to the SUBWOOFER OUT jack. The exception to this would be if the surround (effects) processor is turned off.
When using the receiver in the 2 channel mode, the SUBWOOFER OUT jack is turned off with the BASS OUT/LFE set to SW. By selecting the BOTH option, the SUBWOOFER OUTPUT jack will remain on, regardless of other speaker settings or whether or not the processor is turned on. If the bass level appears diminished or quite low, check the CENTER SPEAKER SIZE selection in the SPEAKER SIZE settings. Set it to SMALL instead of LARGE.