I have the Subwoofer plugged into the output and have it turned ON but it's still not working!

Be sure to set front speakers to "small" on the receiver menu.
Try inputing from one of the tape outputs to the sub this should give you audio if the sub is working properly. Start with the volume on the sub at it's lowest point and slowly increase the volume. If still no audio problem is most likley in the sub.

It only drives a self-powerd sub.

The manual...

http://www.retrevo.com/support/JVC-RX-8010VBKC-Receivers-manual/id/315dj079/t/2/

Page 17:

Setting the Subwoofer Information

Register whether you have connected a subwoofer or not.

Before you start, remember....

• There is a time limit in doing the following steps. If the setting is canceled before you finish, start from step 1 again.

On the front panel ONLY:

1. Press SETTING repeatedly until "SUBWOOFER" appears on the display.

The display changes to show the current setting.

2. Press CONTROL UP / DOWN to select "YES" or "NO."

• Each time you press the button, the display alternates between "YES" and "NO."

YES: Select this when a subwoofer is connected.

NO: Select this when no subwoofer is used.

Note:

You cannot use SUBWOOFER OUT ON/OFF on the front panel (see page 14) and adjust the subwoofer output level (see below) when "SUBWOOFER" is set to "NO."


Then continue with setting its relative level and other things.