Bigwill, It states right on their website that the M22 uses (2) 5-1/4" woofers, where as the M60 uses dual 6-1/2" woofers and a dedicated 5-1/4" midrange driver. Someone correct me if I'm wrong but I believe they are the same driver the M60's just use a x over to direct certain frequencies to specific drivers to clean up the sound.