As far as I'm aware the 10x2 and 5x4 EQ modes are restrictions of the DSP. If there is a 20x1 mode I've never heard it mentioned. The fact that the EQ is parametric is a substantial compensation for having fewer bands - do you really need to attenuate more than 10 individual band centres in your car?

Look at it this way.. we only have a parametric EQ because we ear bashed Philips for months on end to get the specs (along with some nifty hackery by John). The DSP isn't sold as a parametric EQ, you're supposed to load preset responses generated from Philips developer PC software. I doubt any other manufacturer is using the DSP in this way. The empeg wasn't originally advertised as having parametric EQ - it was a bit of a coup when we got it working.

So, look on the bright side!

Rob