Better Bass reproduction with KEF R11 instead of KEF R5 and Sub?

[Max_fl]

Sorry I have so many questions, it’s just my curiosity. When you say 2 feet from the back wall, the front face of mine are roughly 23.5” off the back wall. I had a lot of cancellations in the same area you do when I tried my R7 out from the wall a similar distance as you if I’m understanding correctly. Is your back wall 2 feet away from the rear of the cabinet? The R5 is consistent with what I see in room, done at 40Hz. It looks like the 11 is begging for some back wall gain, I can see the extra extension.

No worries. I just measured, the front of my speakers is 34" from the back wall and the rear is 19.5" from the wall. The room is begging for the acoustic treatment and it's on my list.

 

[Mr. Reeee]

this ignores that the subwoofer will be built for excursion and power handling, whereas the KEFs woofers will be optimized for distortion and linearity.

in practice the SPL increase will be lower, approaching zero towards subbass

melomane13 said:
Eight 6.5″ woofers ( R11) provide approximately 4.5× the effective radiating area of a single 8″ ( your subwoofer).

Looking at the specs of the OP’s NuSub subwoofer it’s rated down to 34hz. It is very compact
Why not either add a second subwoofer or replace it with something that’s rated lower.

The NuSub is extremely compact, so a typical 15” cube subwoofer probably wouldn’t cut it.
Maybe a KEF KC62. They’re small, sound great, are fairly easy to place and are rated lower.

Dual subs are definitely better.