Just get yourself a Tech 21 VT Bass Character Pedal.
http://www.youtube.com/watch?v=_be9GSlt_eQ
They are roughly $149 new and can be found used fairly easily here or on the bay.
A bit cheaper than having an EMG P and BTC preamp installed.
Then down the road you can upgrade your bass and not kiss your EMG Set goodbye or worry about pulling them out and putting all the old stuff back in.