I made a little discovery earlier with my sr bass. The preamp has a 0db and +6db input. You have to pull a connector and reconnect it to another slot. I'm assuming Ibanez uses this pre with different pickups. Most likely the Barts and Nords. I wonder if the nords are hotter and use the 0db input. Swapping the input has the exact affect youd think it would. It takes the tone down. Makes it not so aggressive. I could see this being a benifit with certain amps that have an input attenuation button instead of a gain control. Just thought it was neat whatever the reason its there.