From what I've read on here I have a PP & Cliff saying "one", Home Cinema Choice magazine saying "one", the rep for a subwoofer company telling me "two", more on here saying "two"; in other words there appears to be no real consensus. I guess it all comes back to each room responding differently & probably the install skills of the buyer / dealer.

As I won't be in a position for a home trial I'll have to buy before I try. Hopefully a measured purchase, possibly some GIK room treatments & (soon to be bought) MRC will lead to a happy result, but I'm leaning towards two.

Cinema: Meridian 271, 3 x DSP640 (behind screen), 4 x DSP320 (in-ceiling), 4 x DSP3100 (surrounds), 2 x AC12 (interface). 2 x Perlisten D12s subs, Lyngdorf MP40 processor. DT 145" 2.35 AT screen. Sony VW870 projector & S-T lens, Lumagen Radiance Pro.
Lounge: Roon, NUC, Kef LS50 Wireless + 2 x REL Gibraltar-2 subs

Meridian owner since 1998