How does adding a second subwoofer improve your systems SQ?

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!

And is it the same as the first one?

That would be the way to go, you wouldn’t have different left and right main speakers.

And don’t run them of the "sub output" if using a HT amp, set the programing to "no sub" and set your left and right mains to large and get the signal for your subs from left and right main pre-outputs

Or if using a normal stereo pre amp use these on it’s L & R outputs to supply both your poweramp and your subs
https://www.ebay.com/itm/Valab-Gold-Plated-RCA-Y-Splitter-Adapter-1-Male-to-2-Female-RCA-Adapter-1pcs/283760200309?hash=item42116d0a75:g:RXwAAOSwGBhaYNGt

Cheers George