I don't see why you'd want to do that... You'd have no volume or tone controls.
The Ray4 pre-amp thing isn't really that big of a deal. If you're that worried about it, PM the user "SBMM" about the modification you can do to the pre-amp to tame it and give you more volume control. He is the VP of Marketing at Sterling by Music Man, and very helpful.
Fantastic bass, by the way.
SBMM SUB Ray4 - Squier Vintage Modified Jaguar