The stock MEC preamps are usually used with active pickups but if your bass uses passive pickups than the preamp you have in there now will most likely not work because the volume and blend pots in your preamp are specifically for passive pickups. You would either have to change out the volume and blend pots or get a preamp that works with active pickups. For your Corvette, if you will use active pickups, I highly recommend the EMG preamp. The EMG preamp really brings out the natural tone of Warwicks. I have an EMG BQC preamp in my Thumb 6 broadneck. I am using active Seymour Duncan Basslines pickups and the combination is just superb!