I dont have alot of experience with the 2245's in other than pro applications i.e. sound reinforcement and club systems. I do have alot of experience with the 2231. I find it to be one of the finest woofers JBL made.
I know the 2245 is capable of higher output, when used in a home situation I imagine its relatively high stray magnetic field would be a problem for TV picture distortion. I also think the 2231 is alittle more linear over its range.....Id like to hear from those of you who use them for home theater etc. Thanks! Rich