I use Thiel power points for rears and power planes as mains, mcs1 center with ss1 sub. I had 2.4's for mains until I sold them. My system is dialed in through the p0x crossover to the pp's & planes and there is more symmetry but I lost the really fine soundtrack music after removing the 2.4's. I have a EAD PM 2000, at over 400 wpc into 5, as amplifier. Great amp, great company.