This is very encouraging and now I am looking forward to my 800 even more (due to arrive on Thursday).

Is the 45 degree phase shift via your pre-amp?

150 Hz sounds like a very high number. Is this the cross-over on the sub or the pre-amp? Anything higher than about 80 Hz for a cross-over will cause voices to emanate from the sub and that's not a nice thing.

I don't know if you'll get chest slam with a 600 or 800. These are linear subs that will put out no more than that which they receive. I'll know more later this week.

BTW, there's an 800 in the B-stock store smile

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated