Both are 4 ohm cabs being pushed by my Yamaha BBT500H (500 watts @ 2 ohms) I haven't REALLY pushed it yet but after turning it up somewhat, noticed that the wizzy speaker appears to be giving it's all.I had one wizzy at home prior to my newest addition and the other one left at the guitarist house where we practice so it's usually on the floor. Maybe I just didn't notice so much movement. The Schroeder isn't even wincing as far as cone movement. The wizzy is rated at 200 watts per the sticker however I've read 250 somewhere. Anyway, my question, for those in the know, Just cause I'd like to throw the 12 in the mix and to have all watts available out of the amp ( vs 2 wizzy's). Is this an improper match of speakers? It seemed a good match with the 2 wizzys and the yamaha but I'm really liking the new found volume the schroeder is giving me (speaker surface area). There is no distortion or any other clues that something is wrong other than my observation of the wizzy now that it's up where I can see it.