I've been reading posts here that say you should set your sub volume level to only halfway and use the receiver to control the volume. Well, I have a Kenwood 2080 receiver that I got 3 years ago that is 100 x 5 channels with Dolby Digital and when I set the sub volume to half I really don't get any bass unless I use the receiver to turn it up to like +6 or +7 dB. Is there a problem doing this? Should I turn the volume on the sub more or use the receiver? Thanks for replies.