So, I found a way to keep the soup cans. All I need is :

- a couple of three-foot lengths of SoffitTrap (pre-fab bass trap designed for the room corners)

- a couple of bags of lead shot for stability

- two soup cans per QS8

No problemo !!

http://www.realtraps.com/products.htm#soffittraps

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8