We used one of these with a 5000C on it & it was absolutely fine. It comes with 2 vertical metal supports which can be placed between equipment on the lower level to support the upper level. I remember one HH used one with a 5500HC & it coped fine.

Now that we've bought 2 subs that will go under the screen, the Ikea 'bench' will no longer see active service & the HC will be placed on one of MI's bespoke speaker shelves.

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