Subwoofer Question

No. But unless the subwoofer is next to you, you're best bet is a second matching sub placed elsewhere to offset room modes and standing waves. You don't want to be sitting in a peak or null.

So a second sub eliminates peaks and nulls or just decreases the chances of a listener sitting in one? 

@maprik What type of source program or test tone was used in the spectrum analyzed graph at the bottom of your equipment list?

Did it provide a flat output say from 10HZ on up? 

Does the graph display your speakers and sub-bass woofer output simultaneously or just the speaker output?

@m-db That’s white noise from a Stereophile system test cd. I believe its flat from 20hz to 20khz. The graph is my speakers only without the sub. I will do one with the subwoofer. 

I have tried this, using 1 subwoofer. if you have non-treated room, and the system is not in synergy it will not matter. 

But if you have a well-treated room and the synergy of your speakers are dialed in, Then Yes, it will matter. 

For me, having dual subs enable me to position the sound stage such I can hear the bass drums or cello playing the correct sound stage placement. not just bass, but correct bass alignment and spatial location of the instrument. 

heck, i started to think bass was just bass. but after the dual subs and room treatment. the musical presentation was leaps and bounds better with just 1 sub,

but I always say, YMMV.