i have a singray and it is an active bass.....i checked the battery and everything but it doesn't seem to be that "active" to me....i mean it changes a little but not very much....i took the battery out and it sounded pretty much the same out of my amp.....i don't mind it because my previous bass was passive......also i use the passive input on my amp so i can get the volume i want...the active input just isn't loud enough with my stingray...is this common....maybe it's just me but the stingray seems to be kindof a hybrid between passive and active.....what do you guys think?