How does adding a second subwoofer improve your systems SQ?


The title pretty much covers my question. Thanks for any insights or comments.   
markj941
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geoff your are the original, that's why it's soooooo good giving it to you.
Have you figured out what they’re putting in the water down there yet, Georgie? 
Sunshine in Sydney, our water out of the tap is one of the best anywhere, very drinkable and better than nearly all bottled water, better than the stuff you have coming out your tap.  
Thanks ggc. I just ordered my second sub. Actually, thanks too all

Might I ask what second sub you have ordered? And is it the same as the first one?

Thanks!