| Re: Here's my first graph. I think I need some serious help...
There's not a lot of difference between the last two graphs other than level, so either of those two situations looks fairly good. It looks typical of a lot of rooms with a peak around 37Hz....
The new sub would certainly change the low end extension, but the room is determining your response at these modest SPL measurement levels. Note that the 15" sub you mention above is tuned to 20Hz and has a response down to 18Hz, while the two Paradigmns are 10" with a low end extension of about 23Hz. You will lose rather than gain by trying to mix these different subs together. When we step up the food chain, the usual reaction is to keep the lesser subs, but it isn't a good idea.
You do appear to have a room resonance about 37Hz. A BFD would help with that for sure.
brucek
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