Howdy, I currently play these basses: * Mike Lull M4V, 9V 3 band bart, lindy fralin j's * Modulus Flea 4, 3 band bart pre, bart MM pup (I think it's 9V, but don't have it handy to check) According to my ear, the Modulus is significantly louder at the same volume. I'm assuming this has to do with the relative outputs of each bass. I can adjust my amp to get the Lull nominally louder, but even with double the gain on my amp input, the Modulus is still louder, i.e. 25% gain for Modulus, 50% for Lull. I think this might actually make a material impact on my overall volume capabilities. Is this a common issue? Is this why Lull went to 18v preamps? Is there a preamp solution, e.g. foot pedal preamp? Note: I checked the Lull battery and it's running at over 9V. One note is that my Lull sounds almost identical in volume in passive mode as when active is engaged, although the tone is a bit different. If it makes a difference, I'm using an Asdown ABM500 and the Bergie HT+EX stack. Thanks!