Shame. My room is 14' x 12' and they're working fine. Don't forget the bass units are side-firing, not rear-ported.

Regards,
(Another) Duncan
Main: DSP6k, HD621, Oppo93, PS5, HP 800 G5 Mini, Hitachi 58HK6100U
Kitchen: M80+Echo Show 8"    Office: Echo V1
Bedroom: F80+Echo DotV3     Boxed: MS200 x2, DSP5K x 4