Please excuse my ignorance but I need some help with my 5800 and the instruction manual is no help at all. I find that when listening to CD's the bass is lacking and I would like to increase the bass equally across all speakers. My reciever is not hooked to my TV using any video outputs so therefore I can not use the onscreen display. Is there a way I can just increase the overall bass without having to adjust each speaker individually. If not can I do this without using the on-screen display? I hope this makes sense and someone can help me. I really miss the old days of bass and treble knobs.