I have a 2000 Modulus Q5 with Barts w/ an 18v preamp. (NTMB I think, the bass has 4 knobs, volume, p/u blend, mid freq, and stacked bass/treble) Someone in another forum said the p/u's on this bass were passive and just the preamp was active. So my question is can I just pull the preamp out and put in a couple of volume and tone pots in? Is it that easy? Or will the p/u not have enough output without the preamp? Or is there some way to wire it to be able to switch the pre amp on and off so it can be passive or active with the flip of a switch? Actually the pre amp turns off whenever the plug is pulled, so I guess what I want to be able to do is flip a switch and bypass the onboard pre amp if I want. Is this possible. Any help greatly appreciated.