I'm guessing RAs (the Mouse, specifically) are active?
One of these may be waiting down the road for me, someday.
The piezo loaded RA basses (the ones without a visible pickup) are active and the EQ is active. he only does passive magnetic pickups. I think that you will find, especially with the Mouse, that it is a very natural sounding active system. This is probably due to the hollow body.
Love these basses!