So I am new to wiring up basses. I have recently purchased a Darkglass Tone Capsule V2 active preamp and tried installing it in my ESP B206 myself. The bass makes sound but it's just not very loud compared to the original G & B Co. preamp that came stock. I have thrown together a diagram of how I have everything wired. Forgive me if it's messy. What would be causing such a low volume issue?