Quote:
Originally Posted by Tigger! 
Last thought... is there a high pass and a low pass filter on your sub? When you say 90hz, is that as high as it goes? You want to remove as best you can any filtering on the sub. If you have an option to 'bypass' the filter, that is best. Otherwise you want the two filters at opposit extreems like 35Hz and 180Hz. If there is only one... then it typically will be set to around 180Hz, but they should become obvious once you look.
If there is only one control, set it to the largest number (or better yet off/bypass if that is an option). If there are two, the one with large number goes as high as you can, the one with small numbers goes as low as you can!
Hope that helps.
... And I see Jayray beat me... as always he said so much more with far fewer words then me
Hopefully what I wrote also helps... and makes sense... I just spent a few hours doing algebra manipulations of a huge equation... haven't done that since college... my brain is toast! 

Last thought... is there a high pass and a low pass filter on your sub? When you say 90hz, is that as high as it goes? You want to remove as best you can any filtering on the sub. If you have an option to 'bypass' the filter, that is best. Otherwise you want the two filters at opposit extreems like 35Hz and 180Hz. If there is only one... then it typically will be set to around 180Hz, but they should become obvious once you look.
If there is only one control, set it to the largest number (or better yet off/bypass if that is an option). If there are two, the one with large number goes as high as you can, the one with small numbers goes as low as you can!
Hope that helps.
... And I see Jayray beat me... as always he said so much more with far fewer words then me
Hopefully what I wrote also helps... and makes sense... I just spent a few hours doing algebra manipulations of a huge equation... haven't done that since college... my brain is toast! 
On the back of the sub there are 2 knobs. 1 for volume and 1 for frequency, 90hz is the highest it goes to on the knob. Also, there is a "auto" and "off" switch, as well as a 0 degree and 180 degree phase adjustment. Hope this helps you help me
I am attaching images so you can see what the layout and speaker placements are so you can see exactly what I am up against. Pardon the crappy house, my wife that filed for divorce on me a few months ago has the nice home. LoLThanks again Tigger! and Jayray for all your help.



























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ya know! 