[mach schnell]

so - it actually calls it a p21..., and on the py21w page it lists something as a bau15s and on the p21... page it lists something as a baz15s (he says d, but i think its a typo). then if you do a search on his page for 'base' types you can see diagrams of both the bau15s and baz15s - there is a slight difference on the pix, but all the measurements match - the wattages and voltages appear to be the same between the py21w and the p21-4w...

at any rate, all i know is that the 7225 from the rear, fit the front and worked. but, then again who knows when i finally get the set of 7225's that i ordered to put in the front- i'm sure something will not work - who knows, maybe a new vibration or error message on the cd player.