i play in a band in which the guitar player tunes c-g-c-f-a-c and some our old songs i had bass with this tuning so there's some emphasis on some parts with the low C. i went back to standard tuning and since then all of our new songs i wrote around the frequencies of standard tuning and haven't had any problems. but now when we play some of our old stuff it sounds really weak. we recently got signed and im pretty sure at least some of those old songs are gonna be on the recording. so my question is if i buy an active bass can i boost the lows to make up for the difference in tuning on those songs? i've borrowed a friends five string and i dont hate it but i would like to stick with a four string if at all possible. been looking at a g&l l2000 or an ernie ball stingray. thoughts please?