no.
wanna know that which will give a bigger wow impact.
dirac or atmos (more speaker count)

PB2000, whenever got enough cash at hand. some other things more important came. still stuck with SB12 NSD

You Can always build a new one 😆

At least you can build another sub la abang, you have the skill. 

Oh.......

not 4 but 6!! 9.6.4 coming soon..cant wait to demo 

DTS X will be the new "in" thing

That is true. I am always DTS fan. One reason I opted for AVR with DTS X and Atmos

Yes bought Yamaha A3050

Seven is too much, give it to me one. Hahahaha..this year coming home for good...present for me

And not to forget..with dts + neural x and dolby+ dsu one can enjoy watching old movies with immersive sounds,just done watching Lord Of The Rings Trilogy..really impressive

P/s : Tq bro for drop by and done rew setting plus shifting my subs..really appriciate

It can support 7.2.4 with external power amp. So far I have not seen any that do 7.2.4 just with avr. All of it I seen like denon, Yamaha, Marantz, onkyo, pioneer all only possible with external power amp

So far I have not seen any AVR that support 9 speakers + 4 ceiling. Please do share

Err... how is 580 sq. ft = 5800cu. ft? You cannot directly relate them since cubic feet has 1 extra layer dimension (height). So which is which?

To answer your question, the PB16 Ultra is undeniably the better sub. It has a lot more output below 25hz than the R115. Even if you couple 2xR115 in the same area for maximum amount of gain (+6db~), the PB16 Ultra will still beat them below 16hz with ease. Of course, place them (R115) well and they'll sound smoother than a single sub. You have to decide which is more important to you, smoother response over more seats or more output for 1 (or 2) seats.

Now since your room dimensions isn't clear and I presume that 580 sq. ft is your floor space only, then both subs should (in theory) should cover the space quite well with relative headroom to spare. It's really all down to how big your bank account is.

Personally I'd say buy 1 PB-16U now, then buy another PB-16U later on when you have the funds. Buy once, enjoy forever.